1 "Aleister" monster + 1 LIGHT or EARTH monster
If this card is Special Summoned: You can add 1 "Virakam, the Divine Spirit of Artifice" or 1 "Gamma Summon" from your Deck to your hand, then you can banish 1 monster from either GY. You can banish this card from your GY, then target 1 Fusion Monster you control; monsters your opponent currently controls lose ATK equal to the targeted monster's ATK, until the end of this turn. You can only use each effect of "Invoked Baybarron" once per turn.