Updated 2026-05-12 · community-tracked from the official Discord

Roll an Anime Mutations

Mutations are cash-output multipliers that can appear on any Roll an Anime character regardless of rarity. A character with an AdminAbuse mutation earns 6.89× its base cash rate — that beats most unmodified Epic units outright. The 7-mutation table below was posted in the official Discord #general channel on 2026-04-28, pinned by staff as the community's best-effort reference.

Roll an Anime mutation multiplier table

Source: vorce__ (community contributor) in the official Discord #general (pinned message) on 2026-04-28, pinned by server staff. The author's note: "The author of this table flagged: 'not testers but pretty confident on these numbers'." — treat these as highly accurate community data, not developer-confirmed math.

These multipliers are community-tracked, not officially published by the developer rlrblx. The values are widely trusted in the Roll an Anime Discord community and pinned by staff, but they may be updated as the game patches.

Mutation	Multiplier	Cash boost	Tier	Notes
Radiant	1.92×	+92%	low	Most common mutation tier. A solid upgrade to base cash output.
Aurora	2.63×	+163%	low	More than doubles base cash output.
Starborn	3.93×	+293%	mid	Nearly quadruples base output — a major upgrade worth holding.
Crimson	4.69×	+369%	mid	Strong mid-tier mutation. Worth keeping on any high-rarity unit.
Umbral	5.4×	+440%	high	Rare mutation that puts a character into elite cash-output territory.
Anomaly	5.7×	+470%	high	Top-tier mutation, close to the ceiling for known multipliers.
AdminAbuse	6.89×	+589%	godly	The highest-known mutation multiplier in the community table. An AdminAbuse character earns nearly 7× its base rate.

Update 1.6: Mutation stacking is now live

New in Update 1.6 (2026-05-10): Placed anime can now have multiple mutations and can receive the mutation from the currently active event. Developer quote: "if anomaly event is active, ALL your PLACED anime have a chance of receiving anomaly." — rlrblx in #update-logs.

This fundamentally changes the ceiling for placed characters. Previously each unit could hold at most one mutation. Now characters can accumulate additional mutations through event participation, creating compounding multiplier combinations. Participating in mutation events while your highest-value units are placed is now a core strategy.

How Roll an Anime mutations work

Mutations are special bonus modifiers that can appear on Roll an Anime characters, multiplying their cash output beyond the base rate. A character with a Radiant mutation earns 1.92× more cash than the same character without one. Mutations are separate from the character's rarity tier — a Common with AdminAbuse beats an Epic with no mutation in raw cash output. As of Update 1.6 (2026-05-10), placed anime can now stack MULTIPLE mutations and can receive the mutation from the currently active event.

When you roll a character on a block, the game can randomly apply a mutation to that character. The mutation multiplier stacks on top of everything else — the character's base cash output, the pedestal slot multiplier, and any active event or code buff. The result is that a Common character with AdminAbuse (6.89×) can out-earn a Godly with no mutation, depending on their base rates.

As of Update 1.6, placed characters can stack multiple mutations. During a mutation event, all placed anime have a chance to gain the event mutation on top of whatever mutation they already have. The base mutation table below still applies — each mutation tier is distinct and the multipliers are cumulative.

There is no way to guarantee or choose a mutation when rolling. It is part of the gacha RNG. Every roll on the same block gives you another chance to land a better mutation on the freshly rolled character.

Mutation strategy tips

Mutation beats rarity for cash output

A Common character with AdminAbuse (6.89×) will often out-earn a Godly with no mutation. Always check the mutation before deciding whether to replace a unit.

Park mutated characters on high-multiplier pedestals

Pedestal location multipliers stack with mutation multipliers. Your highest mutation + highest pedestal slot is your peak cash-per-slot combination.

Don't sell a mutated character for a higher-rarity non-mutated one without checking the math

A Starborn (3.93×) or higher mutation on a Rare unit can outperform an Epic unit with no mutation, depending on the base output difference.

Traded anime characters cannot rebirth

Per the developer (2026-05-02): characters acquired by trading do not count toward rebirth. Hold your best self-rolled mutated units for rebirth eligibility.

Mutation stacking: stack multiple mutations per character via active events

As of Update 1.6 (2026-05-10): placed anime can receive the mutation from the current active event. If an Anomaly event is running, all your placed anime have a chance to receive Anomaly on top of their existing mutation. Participate in mutation events to compound your highest-value characters.

Mutation tier groups — what each band means for your strategy

The seven mutations split into four strategic bands. Knowing which band you are in tells you immediately whether to keep a unit, place it in a specific slot, or hold it as a long-term anchor. Here is how each group changes your decisions.

Low tier — Radiant (1.92×) and Aurora (2.63×)

Solid improvements over no mutation, but not enough to change swap decisions by themselves. A Radiant or Aurora unit belongs in any available pedestal slot and should stay until a mid-tier or higher drops in. The key decision rule: do not sell a low-tier mutated unit to fill that slot with a no-mutation unit of the same rarity. The mutation gives a real advantage. Replace a low-tier mutated unit only when a mid-tier or above drops into your collection. Until then, it earns more per hour than an identical un-mutated character and contributes meaningfully to overnight offline compounding.

Mid tier — Starborn (3.93×) and Crimson (4.69×)

These multipliers are strong enough to out-earn characters of a higher rarity band with no mutation. A Starborn Rare earns nearly 4× its base output — enough to beat many no-mutation Epics depending on the base rate gap. The decision rule here shifts: hold a Starborn or Crimson unit in any slot until a high-tier or Godly-tier mutation drops in. Do not replace a mid-tier mutated unit with a higher-rarity no-mutation unit without doing the math first. Keep the Starborn unit in a high-priority pedestal and place the new character in a lower slot instead.

High tier — Umbral (5.40×) and Anomaly (5.70×)

These units belong on your top-priority pedestal slots regardless of their base rarity. An Umbral or Anomaly Common earns more cash than most no-mutation Godly units — the multiplier advantage is that large. The decision rule is simple: an Umbral or Anomaly unit goes in your highest-multiplier pedestal until an AdminAbuse unit displaces it. Protect these units. Do not sell them for inventory space. If you have both an Umbral and an Anomaly unit, AdminAbuse beats Anomaly beats Umbral — but all three belong in your top three pedestal slots.

Godly tier — AdminAbuse (6.89×)

The highest community-tracked mutation multiplier. An AdminAbuse character earns nearly 7× its base cash rate and belongs in your top pedestal slot, full stop. No other unit — regardless of rarity — displaces an AdminAbuse character from that spot unless it also carries AdminAbuse. This is the mutation you build your plot around. If AdminAbuse is on a Common, it still lives in the top slot. The 6.89× multiplier is simply too large to move for anything less. AdminAbuse units are also the best candidates for stacking additional mutations through events, since each stacked mutation compounds on top of the base 6.89×.

How to participate in mutation events (Update 1.6)

Mutation events were added in Update 1.6 on 2026-05-10. They are the primary way to accumulate additional mutations on your placed characters without rolling new dice. Participating correctly during an event window is more valuable than most other in-game actions. Here is the exact participation protocol.

Check whether an event is active before logging out. Mutation events appear in the in-game event banner and are announced in the official Discord #announcements channel. If an Anomaly event is active, all placed anime have a chance to gain Anomaly on top of whatever mutation they currently carry. The event runs for a limited window — once it ends, that opportunity is gone.
Make sure your highest-value units are placed on pedestals before the event window runs. Mutation events apply to placed anime only. A character sitting in your inventory accumulates nothing during an event. Move your top-rarity or top-mutated units onto pedestals before the event begins. The more high-value characters you have placed, the more mutation stacking can happen passively while the event runs.
Log out during the event window with your plot fully populated. Mutation accumulation during an event does not require you to be online — it happens passively for placed characters. Log out with your best units on the plot and let the event apply chances to them while you are offline. Check your characters after logging back in to see if any gained the event mutation.
Do not swap your best units off pedestals to roll new dice during the event. The impulse to use the event window to roll new characters is understandable, but pulling your top-mutated units off their pedestals to make room for new rolls costs those units their event accumulation time. Roll new characters into empty slots first, and only displace placed units if the new character is clearly superior.
After the event ends, audit which placed units gained additional mutations. Sort your placed characters by effective output (rarity + mutation stack) and redistribute your pedestal assignments accordingly. A unit that received an event mutation may have leapfrogged another unit in the priority order.

Developer source (Update 1.6, 2026-05-10): "Placed anime now can have multiple mutations and can now receive the mutation from the current active event! (I.E if anomaly event is active, ALL your PLACED anime have a chance of receiving anomaly)" — rlrblx in official Discord #update-logs.

Mutation stacking: the compounding ceiling explained

Before Update 1.6, each character held at most one mutation. Stacking changes the ceiling entirely. A character with two stacked mutations multiplies its cash output by both — not by the average, but by the product. Understanding this is what separates players who casually check mutations from players who engineer their plots around them.

How stacked multipliers combine

Each mutation multiplier applies on top of the previous. A character with Radiant (1.92×) that picks up a second mutation during an Anomaly event does not average the two — it compounds them. The base cash output multiplied by 1.92× then multiplied again by 5.70× produces a dramatically higher output than either mutation alone. Community data on exact combined stack values is still being compiled, but the compounding math is confirmed by the developer's announcement of the feature.

Which characters benefit most from stacking

High-rarity characters benefit most because their base cash output is already higher. Stacking a second mutation on a Godly unit produces more total cash than stacking it on a Common, because both multipliers are applied to a larger base number. However, since the stacking mechanism applies to all placed anime, even a Common unit with AdminAbuse stacked on top of another mutation can reach a surprisingly high effective output — and is worth protecting in a good pedestal slot.

When to prioritize stacking vs. rolling

During an active mutation event, the ROI from keeping existing units placed and accumulating mutation stacks is often higher than the ROI from rolling new dice to replace those units. Rolling a new die removes the old unit from its pedestal — and potentially from its event accumulation. During mutation events, prioritize keeping your best units placed over rolling new dice on the same block tier. Roll new dice into empty slots only.

The long-game mutation stack strategy

Across multiple mutation events, a character that survives on a pedestal accumulates mutation stacks over time. Each new event is another opportunity for stacking. Late-game accounts that have been through multiple event windows have placed characters with combined stacks that simply are not reachable by new players rolling fresh units. This is the silent long-term advantage of protecting your best-placed characters through events rather than constantly replacing them for marginally higher rarity.

When to pick mutation over rarity: the practical comparison guide

The single most common and expensive mistake in Roll an Anime is replacing a mutated unit with a higher-rarity no-mutation unit and losing net cash output in the process. This guide gives you the framework for making the right call every time a new character drops.

Situation	Right call	Why
You roll a no-mutation Epic. Your current top slot has a Starborn (3.93×) Rare.	Place the Epic in a lower slot. Keep the Starborn Rare in the top slot.	The Starborn 3.93× advantage likely exceeds the base rate gap between Rare and Epic, especially in early block tiers. Verify with the mutations table before swapping the top slot.
You roll a no-mutation Godly. You have an Umbral (5.40×) Super Rare.	Place the Godly in your top slot. Move the Umbral to a high secondary slot.	A Godly's base rate advantage over Super Rare is large enough that the no-mutation Godly typically wins the top slot. The Umbral Super Rare still belongs in your second or third highest pedestal — do not sell it.
Your placed character just gained an event mutation, giving it a second stack.	Re-audit your pedestal priority order. The stacked character may have moved up in effective output ranking.	Mutation stacks compound. A character that was your second-best unit may now be your top earner after gaining an event mutation stack.
You have an AdminAbuse Common and an un-mutated Godly. Which goes on top?	AdminAbuse Common in the top slot. Godly in the second slot.	AdminAbuse at 6.89× on a Common earns approximately 7× base Common rate. Unless the Godly's base rate is more than 7× higher than Common base rate — which is unlikely in the current block tiers — the AdminAbuse Common wins the top slot.

Key principle: Check the mutation multiplier table before every replacement decision. A 10-second look at the table prevents the most common cash-output regression in the game. Mutation first, rarity second — that rule holds in the large majority of placement decisions.

Mutations and rebirth — the rule you need to know

Developer rule (2026-05-02): Characters acquired through trading cannot be used for rebirth, regardless of mutation tier. Only self-rolled characters count toward rebirth progress. Ruby trading is currently disabled.

This means your best mutated units should be ones you rolled yourself. A high-mutation traded character is great for cash output, but it will not help you unlock rebirth progress. Plan your rebirth lineup around self-rolled units — and keep the best mutated ones in both categories if possible.

Read the full rebirth guide

Mutation hunting: what we know about drop rates

The developer has not published official mutation drop rates, and the community has not produced a large-sample tracking project comparable to the block stock chance table. However, consistent patterns across community discussions, YouTube luck-test videos, and RoroWiki's tier descriptions let us describe the mutation probability landscape with reasonable confidence — enough to plan your hunting strategy around.

What the community agrees on about mutation frequency

Mutations appear to be rarer than the character rarity tier they modify. Anecdotal reports from YouTube luck-test videos (players rolling 100+ dice on-camera and tallying mutations) suggest that roughly 10–25% of rolled characters receive a mutation, with higher-tier mutations being progressively rarer within that pool. Radiant (1.92×) and Aurora (2.63×) appear most frequently. AdminAbuse (6.89×) is described across multiple community sources as "extremely rare" — consistent with it being the ceiling multiplier. These are observational patterns, not data-confirmed rates. The developer has not published a mutation probability table.

Mutation hunting vs. rarity hunting: which to prioritize

Since mutations are rarer than rarity upgrades, the efficient strategy is to hunt both simultaneously rather than prioritizing one over the other. Every dice roll checks for character rarity AND mutation independently. Chasing a higher block tier to unlock Epic rolls also means your Epic rolls each have a chance at a mutation. The practical implication: never postpone block upgrades to "farm mutations" on your current tier. The mutation chance is the same on every block — so a higher block gives you the same mutation chance on a higher base rarity. Farm both at the highest block tier you can afford.

Mutation events are the highest-probability mutation source

While the base mutation chance from rolling is unknown, mutation events (Update 1.6, 2026-05-10) apply mutation chances to ALL placed anime — not just newly rolled ones. During an active Anomaly event, every character on your plot has a chance to receive Anomaly. This is a fundamentally different probability structure: instead of one chance per dice roll, you get one chance per placed character, and the event runs for a limited window. A plot with 8 placed characters during an Anomaly event gets 8 independent chances at gaining Anomaly — no dice required. For high-tier mutations like Anomaly (5.70×) and AdminAbuse (6.89×), mutation events are the single best acquisition path in the game.

How to maximize mutation event participation

Check for active mutation events every session. The in-game event banner and the official Discord #announcements channel are the two sources. When a mutation event is active, immediately: (1) place your highest-value units on your best pedestal slots — even if you normally keep them in inventory, (2) fill every empty pedestal with whatever you have, (3) log out and let the event run its course on your placed characters. The event applies chances passively — you do not need to be online. Check back after the event window closes to see which units gained the event mutation. Re-audit your pedestal priority order based on the new mutation stacks.

Source: Mutation drop rate observations are from community discussions and RoroWiki gameplay descriptions. No official rates have been published by rlrblx. Mutation event mechanics are confirmed by the developer in Update 1.6 patch notes (Discord #update-logs, 2026-05-10).

Mutation event calendar strategy: how to plan around event cycles

Mutation events in Roll an Anime are time-limited windows where the game temporarily applies a specific mutation to all placed characters. Events do not run on a published schedule — they are announced ad-hoc by the developer. But understanding how to plan around them changes your entire account strategy. Treat mutation events not as random bonuses, but as scheduled opportunities to compound your best units.

What to do before an event: preparation phase

You cannot predict exactly when a mutation event will drop, but you can stay ready. Maintain a plot where at least your top 3–4 pedestal slots hold characters you want to preserve long-term — ideally with at least one existing mutation each. Keep a cash buffer for dice purchases during the event (event windows buff roll outcomes and mutation chances simultaneously). Check the update log and Discord #announcements daily — mutation events are usually announced there first. If the developer posts a teaser or a "big update coming" message, assume a mutation event may accompany it and keep your best units placed.

What to do during an event: active participation

The moment a mutation event is confirmed active: (1) Verify all your best self-rolled units are placed on pedestals — traded units cannot rebirth but they CAN receive event mutations for cash output. (2) Fill any empty pedestal slots immediately — empty slots get zero mutation chances. (3) Spend your cash buffer on dice during the event window if the block tier is appropriate — new rolls during the event also receive the event mutation chance. (4) If the event mutation is high-tier (Anomaly 5.70× or better), consider rolling aggressively — landing that mutation on a fresh roll is the single highest-value outcome per dice in the game.

What to do after an event: audit and rebalance

When the mutation event window closes, audit every placed character. Check which units gained the event mutation. A character that went from one mutation to two stacked mutations may have jumped from your fifth-best earner to your top earner. Redistribute your pedestal assignments: sort all placed characters by effective output (rarity tier × existing mutations), assign the top earner to your highest-multiplier pedestal, and work down. Record which characters gained event mutations in your mental notes — these are now priority-protect units for future events. The long-game compounding happens across multiple events on the same character.

How to handle back-to-back mutation events

If two different mutation events run in close succession (e.g., an Anomaly event followed by a separate AdminAbuse event a week later), your strategy shifts. The characters that gained Anomaly in the first event are now your highest-priority pedestal occupants for the AdminAbuse event — because AdminAbuse (6.89×) stacked on Anomaly (5.70×) produces a combined multiplier that no single-mutation unit can match. During the second event, these double-stack candidates go in your absolute best pedestal slots. Do not remove them to roll new dice during the second event — the chance of gaining a third mutation stack is more valuable than the chance of rolling a new unit that starts from zero stacks.

Mutation-rebirth synergy: the long-game compounding engine

Rebirth is a permanent multiplier on your cash output. Mutations are per-character cash multipliers. When both systems interact on the same account, the result is multiplicative: your rebirth multiplier amplifies every character's mutation-multiplied cash output. Understanding this interaction is what separates accounts that plateau at Epic-tier income from accounts that compound into Godly-tier passive earnings.

How rebirth multipliers amplify mutations

A character with AdminAbuse (6.89×) earns nearly 7× its base rate. After one rebirth with a permanent multiplier (let us call it R), that character now earns 6.89× × R × base rate. After two rebirths, it earns 6.89× × R₁ × R₂ × base rate. Each rebirth multiplier compounds on top of the mutation multiplier. This is why protecting high-mutation units through rebirth cycles is the single most powerful long-term strategy in Roll an Anime: a triple-mutated character carried through three rebirth cycles earns at a rate that a freshly rolled Godly with no mutations cannot approach, even on the same block tier. The mutation multiplier is permanent — it does not reset on rebirth.

Which units to protect through rebirth

Only self-rolled characters can be used for rebirth eligibility — the developer confirmed this on 2026-05-02. But the mutation multiplier on ALL characters (self-rolled or traded) persists through rebirth and continues multiplying cash output. Priority order for post-rebirth protection: (1) Self-rolled characters with mid-tier or higher mutations (Starborn 3.93× and above) — these are both your rebirth currency AND your cash engines. (2) Self-rolled characters with any mutation — keep them placed, do not sell them for inventory space. (3) Traded characters with high-tier mutations — they cannot count toward rebirth but their cash output is still amplified by your rebirth multiplier. Protect them in high-priority pedestal slots after rebirth.

The cash snowball effect across multiple rebirths

Rebirth 1 with a Starborn (3.93×) Epic on your top pedestal: the character earns 3.93× its base rate, and the rebirth multiplier amplifies that further. By the time you reach the same block tier in cycle 2 that you had in cycle 1, the mutated character is earning significantly more cash than it did at the same point in cycle 1 — because the rebirth multiplier is compounding on top of the unchanged mutation multiplier. By cycle 3, a protected AdminAbuse unit earns at a rate that makes block upgrades affordable in hours rather than days. This is the intended late-game loop: the developer designed rebirth and mutations to compound together, creating an accelerating cash curve that rewards account longevity over grinding.

Mutation-rebirth timing: when to trigger rebirth for maximum mutation value

Trigger rebirth after a mutation event, not before. If a mutation event just ended and several of your placed characters gained new mutation stacks, those stacks are now permanent — triggering rebirth immediately after locks in those new mutations as part of your post-rebirth account. Delaying rebirth until after you have stacked mutations from an event means you enter the next cycle with higher-value units already placed. Conversely, triggering rebirth right before a mutation event means you reset your block tier and placed characters — and then the event runs on your reset, low-tier plot. That wastes the event window. The optimal timing: participate in mutation event → audit and lock in new stacks → then trigger rebirth with those stacked units protected.

The rebirth guide covers the full rebirth decision framework, including when to trigger, what carries over, and the cash reserve needed for post-rebirth recovery. See the rebirth guide for the complete strategy.

Mutation stacking ROI: when to stack vs. when to replace

Mutation stacking (Update 1.6) gives every placed character a chance to gain additional mutations from active events. But not every unit is worth keeping on a pedestal solely for stacking potential. The framework below helps you decide whether to keep a unit placed for stacking or replace it with a newly rolled character.

Your current unit	Stacking decision	Why
Common with Radiant (1.92×) — event mutation available	Stack it. Keep placed during the event. Radiant × event mutation (e.g., Anomaly 5.70×) produces a combined multiplier that beats most no-mutation Epics. The stacked Common is now a mid-game earner.	A Common is easy to replace, but a double-stacked Common is not. The event mutation is free — stacking costs you nothing but the pedestal slot. An empty slot earns zero and gets zero mutation chances.
Rare with no mutation — event mutation available vs. fresh roll opportunity	Stack it if no better candidate is available. An un-mutated Rare gaining Anomaly (5.70×) becomes a 5.70× Rare — a unit worth protecting. But if you have a Starborn Rare that could occupy that slot, move the un-mutated Rare to a lower slot and put the Starborn Rare in the higher-priority pedestal for the event.	Event mutation chances per character are independent. Having 8 characters placed gives 8 chances. An un-mutated character still gets a chance. Do not leave a slot empty during a mutation event — even an un-mutated unit is a lottery ticket.
Super Rare with Starborn (3.93×) — event mutation available	Stack it, full stop. A Starborn Super Rare is already competitive with no-mutation Epics. Stacking Anomaly on top produces a unit that rivals no-mutation Godly units. This unit goes in your top-priority pedestal for the event duration.	This is the inflection point where stacking value exceeds replacement value. A double-stacked Super Rare is worth more than most freshly rolled Epics. Protect this unit through the event and audit after — it may be your new top earner.
Epic with Umbral (5.40×) — event mutation available	Stack it and protect it permanently. Umbral (5.40×) × event mutation produces a combined output that puts this unit firmly in endgame territory. Do not sell, trade, or displace this unit for any reason short of rolling an AdminAbuse Godly. This is a multi-rebirth anchor character.	An Umbral Epic is already one of the strongest possible units. Adding a second mutation stack creates a unit that will likely remain in your top two pedestal slots for weeks or months. Every subsequent mutation event that stacks further on this unit compounds your long-term cash curve.

The stacking priority rule: during any mutation event, sort your placed characters by their existing mutation tier × rarity and assign pedestal slots from highest multiplier to lowest. Characters with existing mid-tier or higher mutations occupy the best slots — because each additional mutation stack on an already-mutated unit compounds more total cash than a first mutation on an un-mutated unit. The rich get richer during mutation events.

Roll an Anime mutations FAQ

What is a mutation in Roll an Anime?

A mutation is a cash-output multiplier that can appear on any Roll an Anime character regardless of its rarity. The multiplier stacks on top of the character's base cash output. A Radiant mutation adds +92%, while the best-known mutation (AdminAbuse) adds +589%.

How do I get a mutation on my character?

Mutations are applied randomly when you roll a character on a block. You cannot choose or guarantee a mutation — it is part of the gacha RNG. Rerolling the same block pool gives you another chance to land a mutation.

Are mutation multipliers official?

The table on this page is community-tracked data posted on 2026-04-28 in the official Discord's #general channel by vorce__, then pinned by server staff. The author noted 'not testers but pretty confident on these numbers'. The developer (rlrblx) has not published an official mutation multiplier table as of 2026-05-06.

Does mutation affect offline cash earnings?

Based on game mechanics, the mutation multiplier applies to the character's overall cash output — offline earnings follow the same character output rate, so yes, a higher mutation earns more cash both online and offline. This is not explicitly confirmed by the developer, but is consistent with how the offline system works.

Can a traded character with a mutation be used for rebirth?

No. The developer posted on 2026-05-02: 'you cannot rebirth with anime's that are acquired by trades. This is intentional for balancing.' This applies regardless of mutation tier.

What is mutation stacking in Roll an Anime?

Added in Update 1.6 (2026-05-10): placed anime can now have multiple mutations at the same time. During an active mutation event, all placed anime have a chance to receive the event's mutation on top of any mutation they already have. For example, if an Anomaly event is running, your placed anime with Radiant could also gain Anomaly. This was confirmed by developer rlrblx in the official Discord #update-logs channel.

How do I get mutation stacking on my characters?

Participate in active mutation events. When a mutation event is running (check the official Discord #announcements and the in-game event banner), all anime you have placed on pedestals have a chance to gain that event's mutation. You do not need to roll new characters — existing placed units can receive the event mutation passively.