Zeru, Dragonslayer Commander (AVL-072 SR) [Attack on Velmardia]

"Mythic" [Enraging] [Pierce] [Aegis] Resonators you control gain [+100/+100] for each Treasury Item entity you control. Whenever you play a Treasury Item spell >>> Draw a card. If this is the second time this ability triggers this turn, search your deck for a card named "Dragonslayer" and put it into the field, then shuffle your deck. If this is the third time this ability triggers this turn, recover this card.