Aleister the Invoker of Madness [GEIM-EN053] Ultra Rare

2 monsters with different Types and different Attributes
This card's name becomes "Aleister the Invoker" while on the field or in the GY. If a monster is Fusion Summoned while you control this monster (except during the Damage Step): You can discard 1 card, and if you do, add 1 "Invocation" or "The Book of the Law" from your Deck to your hand. If this face-up card you control leaves the field because of an opponent's card effect: You can add 1 "Omega Summon" from your Deck to your hand.