Voidslime

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3cmc instant that counters spells, activated abilities, OR triggered abilities — one of only a handful of effects in Magic that can counter activated and triggered abilities, making it uniquely versatile beyond Counterspell. Signature in Simic control and stax-prison shells where shutting down ETB triggers, combo activations, or opponent win-condition triggers is critical. The {G}{U}{U} pip requirement restricts it to green-blue color identities, which limits its homes but doesn't reduce power within those shells.

• Voidslime is one of the very few cards that can counter triggered abilities on the stack (e.g., Thassa's Oracle's ETB win trigger), making it a cEDH staple specifically for shutting down instant-win triggers that regular counterspells also hit.

  tagging · claude-sonnet-4-6

• Unlike Stifle, Voidslime also counters spells, so it replaces Stifle entirely in decks that can afford the higher mana cost and color requirement; the floor of 'counter a spell' means it is never a dead card.

  tagging · claude-sonnet-4-6

• The {G}{U}{U} cost means it is only available to commanders with both green and blue in their color identity, which rules out mono-blue and Dimir/Azorius control archetypes that might otherwise prioritize it.

  tagging · claude-sonnet-4-6

• EDHREC rank: #4,334