Your whole army cannot be captured for your opponent's next 2 turns, and every enemy piece standing next to one of your pieces is locked in place for its next turn.
You draft Stoneskin in Buff mode. Instant: it takes effect the moment you draft it.
As a protection card, it shields a piece or bars squares from the opponent.
“Skin like slate, and the ground grips whoever leans on it.”
Affects your whole army.