You can Ritual Summon this card with a Libromancer card. If this card is Ritual Summoned by using a monster(s) on the field, it can attack directly. You can only use each of the following effects of Libromancer Doombroker once per turn. During your Main Phase: You can Set 1 Libromancer Trap directly from your Deck. When this card inflicts battle damage to your opponent: You can target 1 face-up monster your opponent controls; shuffle it into the Deck.