Mask of Many Faces

Instant -

, destroy this: Name a card. The next attack action card you play this turn gains that name.

Blade Break

Rulings

From the Outsiders release notes

The attack action card gains the name in addition to its own name. E.g. If you name “Head Jab” and play Surging Strike, it would have both names “Head Jab” and “Surging Strike”.
You may only name a card if that card exists and is legal in the format being played.
The attack action card later loses that name once it enters another zone in the arena, E.g. when the combat chain closes and the card is put in the graveyard, the gained name is lost.

Older rulings (1)

~~Tokens are not cards, and can not be named unless there is a card with the same name.~~
Changed 2023-10-06
Tokens are cards (token-cards) since 6 October 2023, so a token’s name (Runechant, Spectral Shield …) can be named (rule 8.5.21b).

Keyword notes

Bladebreak - Equipment that are fragile and break after being used to defend. If you defend with a card with Blade Break, destroy it when the combat chain closes.

When you defend with a card it remains on the combat chain until the chain closes, therefore you cannot defend with an equipment multiple times on the same combat chain.
When this card is destroyed, it is sent to your graveyard.
The ability becomes a layer on the chain when the combat chain closes.
The Blade Break ability becomes a layer on the chain when the combat chain closes.
The ability goes on the stack when the combat chain closes.

All keywords

ClassNinja

TypeEquipment

SubtypesHead

Defense1

KeywordsBlade Break

SetsKAT, OUT