The whole army surges: for your next 3 turns, every one of your knights, bishops, rooks, and queens can also step one square in any direction.
You draft Onslaught in Buff mode. Passive: it works on its own the whole time you hold it, with nothing to activate.
As a movement card, it changes how one of your pieces is allowed to move.
Affects your knights, bishops, rooks, and queens.