Silence and stun an enemy unit.
Onslaught: Then kill it.
Card sounds may differ from in-game as they get updated.
Silence - Remove all text from a card and its attachments.
Stun - Exhaust a unit. It can't attack or block next turn.
Onslaught - Does something when played if you or any of your units have attacked this turn. This includes standard attacks as well as Killer and Relic Weapon attacks.