Released March 2026

Teenage Mutant Ninja Turtles

What's New

🧪MutagenNEW

A colorless artifact token you tap and sacrifice at sorcery speed to grow a creature.

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A Mutagen token is a colorless artifact with the artifact subtype Mutagen — no mana cost, so its mana value is 0.
Its ability costs {1}, tap, and sacrifice the token, and on resolution puts one +1/+1 counter on the targeted creature.
Activation is sorcery speed only — the printed "Activate only as a sorcery" locks it to your main phase with an empty stack.
"Mutagen" is an artifact subtype, not a creature type — the corresponding creature type in this set is Mutant, so there's no tribal overlap.
If a spell or ability that creates Mutagen tokens requires targets and all of them are illegal as it resolves, the tokens are not created.
Because they're artifacts, Mutagen tokens feed affinity for artifacts and anything that cares about artifacts entering or leaving the battlefield.

Does the Mutagen ability use the stack?	Yes — it's an activated ability that goes on the stack and needs to resolve.
Can opponents respond?	Yes. They can respond before the counter is placed — for example, by killing the targeted creature.
When can I activate it?	Sorcery speed only — during your main phase with an empty stack. Never in combat or on an opponent's turn.
Can I use the same token twice?	No. Sacrificing it is part of the cost, so each Mutagen token is a one-shot.

📖 Official rule text

Card text: (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")

Rule 111.10v

A Mutagen token is a colorless Mutagen artifact token with “{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.”

Likely interactions

⚡ Disappear

Tapping and sacrificing a Mutagen token removes a permanent from the battlefield under your control, which satisfies Disappear conditions for the rest of the turn.

111.10

⚡ Multipliers

Counter and token multipliers pile up fast: Doubling Season doubles both the initial Mutagen tokens created and the +1/+1 counters placed when you activate them.

111.10

⚡ Board wipes

Mass artifact destruction sweeps every Mutagen token. Because activation is sorcery-speed only, you can't sacrifice them in response to an instant-speed wipe or on your opponent's turn to salvage value.

111.10

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🥷SneakNEW

An alternative cost that lets you cast a spell mid-combat by bouncing an unblocked attacker.

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Sneak is an alternative casting cost, not an activated ability — the spell is cast and goes on the stack, subject to normal priority and counterspells.
You can only cast a Sneak spell during your declare blockers step, after blockers have been declared, when you could cast an instant.
The cost includes both the listed mana and returning an unblocked attacker you control to its owner's hand. Returning it is part of the cost, so it doesn't use the stack and can't be responded to.
A creature cast for its Sneak cost enters tapped and attacking the same player, planeswalker, or battle the returned creature was attacking — you don't choose the target.
That creature was never declared as an attacker, so abilities that trigger "whenever a creature attacks" won't trigger when it enters attacking.
Sneak also appears on instants and sorceries — those follow the same timing and bounce cost but resolve as ordinary non-permanent spells.

Does a Sneak spell use the stack?	Yes — it's cast onto the stack like any other spell.
Can opponents respond?	They can respond to the spell on the stack, but not to the bounce — returning the attacker is a cost, not part of the effect.
When can I cast for the Sneak cost?	Only during your own declare blockers step, after your opponent has declared blockers.
Is there a limit per turn?	No. You can use Sneak as many times as you have unblocked attackers and mana to pay for.

📖 Official rule text

Card text: (You may cast this spell for {1}{U} if you also return an unblocked attacker you control to hand during the declare blockers step. He enters tapped and attacking.)

Rule 702.190a

Sneak is a keyword that represents a static ability that functions while the spell with sneak is on the stack.

Rule 702.190a

“Sneak [cost]” means “Any time you could cast an instant during your declare blockers step, you may cast this spell by paying [cost] and returning an unblocked creature you control to its owner’s hand rather than paying this spell’s mana cost.”

Rule 702.190b

A permanent spell whose sneak cost was paid enters the battlefield tapped and attacking (see rule 506.3a). It will be attacking the same player, planeswalker, or battle as the creature that was returned to its owner’s hand to pay the sneak cost of the spell that became that permanent.

Likely interactions

☠️ Countered

A Sneak spell is a real spell on the stack, so counterspells like Negate hit it normally. If it's countered, the creature you returned to pay the cost simply stays in your hand and the spell goes to the graveyard.

702.190

☠️ Removal

If an opponent targets your unblocked attacker with removal during the declare blockers step, you can respond by casting a Sneak spell — the attacker returns to hand as a cost, and the removal fizzles for lack of a legal target.

702.190

⚡ Commander tax

Sneak is an alternative cost, so it doesn't bypass the Commander tax — that additional {2} per prior cast still has to be paid on top of the Sneak cost.

702.190

⚡ Leaves triggers

Bouncing an attacker to pay the Sneak cost moves it from the battlefield to hand. Whether that interacts with abilities keyed to a creature leaving the battlefield is a genuinely fiddly timing point worth confirming.

702.190

⚖️ Ask the Judge →

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💨DisappearNEW

An ability word for abilities that reward a permanent leaving the battlefield under your control this turn.

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Disappear is an ability word — it has no rules meaning of its own and just groups abilities that share one trigger condition. This is a judge-checkable design point rather than a Comprehensive Rules definition, since ability words carry no independent CR text.
The shared condition, per the WotC release notes: a permanent left the battlefield under your control this turn. The method — destroyed, sacrificed, exiled, or returned to hand — doesn't matter.
Most Disappear abilities are triggered abilities with an intervening "if" clause: if no permanent has left the battlefield under your control by the time they'd trigger, they don't trigger at all (release notes).
The check is a retroactive look-back over the whole turn — the Disappear permanent doesn't need to have been on the battlefield when the other permanent left (release notes / WotC mechanics article).
Any permanent type qualifies — lands, tokens, enchantments, planeswalkers, Food, even Mutagen tokens (dossier).
The permanent must have left under your control; ownership is irrelevant, so a stolen permanent that leaves while you control it still counts (release notes / dossier).

Does Disappear use the stack?	Yes — these are ordinary triggered abilities that go on the stack when they trigger.
Can opponents respond?	Yes — once the trigger is on the stack, opponents get priority to respond before it resolves.
When do Disappear abilities trigger?	Usually at the beginning of your end step, or when the Disappear permanent enters, depending on the card.
How often per turn?	End-step Disappear abilities check the condition and fire once per turn.

📖 Official rule text

Card text: (Disappear — At the beginning of your end step, if a permanent left the battlefield under your control this turn, [effect].)

Rule 702.190b

returning an unblocked creature you control to its owner’s hand

Likely interactions

⚡ Sneak

Paying a Sneak cost requires returning an unblocked creature you control to its owner's hand, which removes a permanent from the battlefield under your control and automatically satisfies Disappear for the rest of the turn.

702.190

⚡ Fetch lands

Sacrificing a fetch land makes a permanent leave the battlefield under your control, so it enables Disappear with no extra resources spent.

🔄 Flicker

Blink and flicker effects that exile a creature and return it still count — the creature left the battlefield under your control, which fully enables Disappear.

⚡ Opponent's permanents

A permanent leaving under an opponent's control doesn't help you — but if you first gain control of it and then it leaves while yours, the condition is met. The exact control-timing can be worth a check.

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Set Timeline

Lorwyn Eclipsed

January 2026

Archived →

Teenage Mutant Ninja Turtles

March 2026

Archived →

Secrets of Strixhaven

April 2026

Archived →