Justice of Prophecy

During your End Phase, if you have activated a "Spellbook" Spell Card previously this turn: 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.