Burst

How 【Burst】 works

Shields are face-down cards, and some of them have a 【Burst】 effect printed for the moment they get revealed. When shield damage flips the card, the Burst can activate: a free counterpunch that the attacker paid for with their own attack. Typical Bursts deploy a blocker, remove an attacker, or claw back resources mid-defense.

Official rulings confirm those plays are fully real. A Unit put into play or set active by a Burst behaves the same as if you had done it on your own turn.

Deck-building with it

You never know which cards end up in your shields, so Burst density is a numbers game. Every Burst card in the 50 raises the odds that an opponent's attack flips one. Aggressive decks mostly ignore this; midrange and defensive lists treat Bursts as free insurance that makes racing them miserable.