Costume Closet — ruling 1

Once Costume Closet runs out of +1/+1 counters, it remains on the battlefield. However, activating its second ability won't do anything.

Costume Closet — ruling 2

If Costume Closet has left the battlefield or has no +1/+1 counters on it by the time its activated ability resolves, you won't put a +1/+1 counter on the target creature. If the creature becomes an illegal target or can't have a +1/+1 counter put onto it for some other reason, you won't remove a +1/+1 counter from Costume Closet.

Costume Closet — ruling 3

An Aura controlled by an opponent does not cause a creature you control to be modified.

Costume Closet — ruling 4

A creature that is equipped is considered modified no matter who controls the Equipment that's attached to it.

Costume Closet — ruling 5

The +1/+1 counters on Costume Closet won't affect it unless it somehow becomes a creature.

Costume Closet — ruling 6

A creature with a counter on it is considered modified no matter what kind of counter it is or which player put it on that creature.

Costume Closet : règles, fonctionnement et interactions (MTG)

Costume Closet 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

This artifact enters with two +1/+1 counters on it. : Move a +1/+1 counter from this artifact onto target creature you control. Activate only as a sorcery. Whenever a modified creature you control leaves the battlefield, put a +1/+1 counter on this artifact. (Equipment, Auras you control, and counters are modifications.)

How it works : Costume Closet

Original English text — Wizards of the Coast / Scryfall

#1September 19, 2025· Wizards of the Coast
Once Costume Closet runs out of +1/+1 counters, it remains on the battlefield. However, activating its second ability won't do anything.
No other card is named in this ruling.
#2September 19, 2025· Wizards of the Coast
If Costume Closet has left the battlefield or has no +1/+1 counters on it by the time its activated ability resolves, you won't put a +1/+1 counter on the target creature. If the creature becomes an illegal target or can't have a +1/+1 counter put onto it for some other reason, you won't remove a +1/+1 counter from Costume Closet.
No other card is named in this ruling.
#3September 19, 2025· Wizards of the Coast
An Aura controlled by an opponent does not cause a creature you control to be modified.
No other card is named in this ruling.
#4September 19, 2025· Wizards of the Coast
A creature that is equipped is considered modified no matter who controls the Equipment that's attached to it.
No other card is named in this ruling.
#5September 19, 2025· Wizards of the Coast
The +1/+1 counters on Costume Closet won't affect it unless it somehow becomes a creature.
No other card is named in this ruling.
#6September 19, 2025· Wizards of the Coast
A creature with a counter on it is considered modified no matter what kind of counter it is or which player put it on that creature.
No other card is named in this ruling.