High Priestess of Prophecy [REDU-EN020] Secret Rare 24a You may cast any number

You may cast any number of nonland cards exiled this way without paying their mana costs

(They can't be blocked as long as defending player controls a Mountain

Whenever Phage deals combat damage to a creature

Threshold — {U}

High Priestess of Prophecy [REDU-EN020] Secret Rare 24a You may cast any numberSet: Return of the Duelist Card type: Effect Monster Rarity: Secret Rare Attack: 2500 Defense: 2100 You can reveal 3 "Spellbook" Spell Cards in your hand; Special Summon this card from your hand. Once per turn: You can banish 1 "Spellbook" Spell Card from your hand or Graveyard to target 1 card on the field; destroy that target.