Justice of Prophecy

During the End Phase of every turn in which you activate a "Spellbook" Spell Card: You can banish this card from the field; add both 1 Level 5 or higher LIGHT or DARK Spellcaster-Type monster and 1 "Spellbook" Spell Card from your Deck to your hand. You can only use the effect of "Justice of Prophecy" once per turn.