Mask of Shifting Perspectives

Attack Reaction - Destroy this: Whenever a dagger hits this turn, you may put a card from your hand on the bottom of your deck. If you do, draw a card.

Blade Break

Rulings

From the Outsiders release notes

Mask of Shifting Perspectives can be activated (in the reaction step) even if you are not currently attacking with a dagger.
Mask of Shifting Perspectives must be activated and resolved during the reaction step of combat, before a dagger is considered to have hit for the effect to trigger.
The effect created by Mask of Shifting Perspectives triggers every time a dagger hits this turn, not just the first time.

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

ClassAssassin, Ninja

TypeEquipment

SubtypesHead

Defense1

KeywordsBlade Break

SetsBEN, OUT, UZU