If this card is Link Summoned: You can reveal 3 "Spellbook" cards with different names from your Deck, your opponent randomly picks 1 for you to add to your hand, and you shuffle the rest back into your Deck. You can only use this effect of "Crowley, the First Propheseer" once per turn. Each turn, 1 Spellcaster monster you Normal Summon can be Summoned without Tributing.