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.