Corrosive Ooze is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
Whenever this creature blocks or becomes blocked by an equipped creature, destroy all Equipment attached to that creature at end of combat.
Complete guide
Corrosive Ooze is a specialized defensive creature designed to punish opponents who rely heavily on powerful Gear. Its ability ensures that any weapon or armor used against it will be dissolved into nothingness by the time the fight is over.
What it Does
Corrosive Ooze features a triggered ability that reacts whenever it enters combat with an equipped creature. Unlike many effects that happen immediately, the Ooze creates a delayed trigger that waits until the End of Combat step to destroy the specific Equipment involved.
How it Resolves Step by Step
First, the Ooze must be declared as a blocker for an equipped creature, or an equipped creature must block it. This causes the ability to trigger. During the End of Combat step, the game checks which Equipment were attached to that specific creature. All such Equipment are then destroyed and moved to the graveyard.
Important Timing and Rulings
A key detail is that the Ooze does not need to remain on the battlefield for the destruction to occur; even if it dies during the combat damage step, the delayed trigger still resolves. Similarly, if the equipped creature is destroyed or leaves the battlefield before the end of combat, the Ooze remembers what was attached to it and destroys those items anyway.
When to Play It
This card is a fantastic sideboard option against decks utilizing powerful Equipment like Swords or Batterskull. It forces your opponent into a lose-lose situation: they either refrain from attacking or lose their valuable artifacts.
Interaction examples
Llanowar ElvesIf your opponent attacks with a Llanowar Elves that is equipped with a Short Sword, and you block with Corrosive Ooze, the ability triggers. Even if the Elves survive the 2/2 damage, the Short Sword will be destroyed at the end of the combat phase.
Birds of ParadiseIf you attack with Corrosive Ooze and your opponent blocks with a Birds of Paradise that has been equipped with Plate Armor, the Ooze's ability triggers. Because the Birds of Paradise became a blocker while equipped, its Plate Armor is destroyed at the end of combat, leaving the Bird vulnerable for the next turn.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Corrosive Ooze
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
The set of Equipment to be destroyed is determined only as Corrosive Ooze’s delayed triggered ability resolves at the end of combat. The Equipment will be destroyed even if Corrosive Ooze leaves the battlefield before that time.
No other card is named in this ruling.
- #2· Wizards of the Coast
If the creature Corrosive Ooze blocks or is blocking leaves the battlefield, the Equipment that was attached to that creature immediately before it left the battlefield will be destroyed as Corrosive Ooze’s delayed triggered ability resolves at the end of combat.
No other card is named in this ruling.
Legal formats
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Meta decks with Corrosive Ooze
No archived Top 8 deck with this card yet.