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.