Conquerer of Three Worlds Ragnaraku #EB01-039

[Main] DON!! -1 (You may return the specified number of DON!! cards from your field to your DON!! deck.): K.O. up to 1 of your opponent's Characters with a cost of 8 or less.

[Trigger] Add up to 1 DON!! card from your DON!! deck and set it as active.