When you play another Oni, play a +1 Strength weapon with Overwhelm on it.
Onslaught: You may move a weapon of your choice to the top of your deck.
Card sounds may differ from in-game as they get updated.
Overwhelm - A unit or spell with Overwhelm will deal any excess damage to your opponent on your turn (does not work while blocking).
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.