Played in the meta
Most-played 〈Blocker〉 cards in GD04 meta decks.
Cards with Blocker
80 total
How Blocker works
When an enemy Unit attacks, you may rest a Unit with <Blocker> to change the attack target to it. The Blocker must be active (standing) to do this — a rested Unit can't block, which is why attacking with your Blockers is usually a real cost, not a free swing. Once the block is declared, the battle plays out between the attacker and the Blocker instead of the original target.
Blocker is a keyword effect (the white <> icon on the card), so anything that interacts with keyword effects — granting them, removing them, or checking for them — sees Blocker.
Rulings & edge cases
A block, once declared, sticks: if a Unit gains <Blocker> from a conditional effect, blocks, and the condition later becomes unfulfilled mid-battle, the two Units still finish that battle — losing the keyword doesn't retroactively cancel an established block (official FAQ ruling).
Blocking only changes the attack target. It doesn't stop 【Attack】 triggers that already fired, and effect damage such as <Breach> is not battle damage, so protections tied to blocking don't help against it.
Playing with and against it
Blockers are the backbone of defensive shells: high-HP bodies with <Blocker> tax every attack the opponent makes, and pairing them with <Repair> lets the same wall soak damage turn after turn. Against Blocker-heavy boards, the clean answers are <High-Maneuver> attackers (which simply can't be blocked), removal before the attack step, or forcing bad blocks with buffed attackers so the wall trades down.