For your opponent's next 2 turns, their bishops, rooks and queen cannot move to any square from which they would attack your king. Knights and pawns may still menace.
You draft Pillow Fort in Buff mode. Passive: it works on its own the whole time you hold it, with nothing to activate.
As a protection card, it shields a piece or bars squares from the opponent.
“Structurally unsound. Emotionally impenetrable.”