1 "roid" Fusion Monster + 1 "roid" monster
You can target 1 face-up monster your opponent controls; Special Summon 1 "roid" monster from your Deck or Extra Deck with ATK less than or equal to that...
You can Ritual Summon this card with "Endless of the World". This cardfs name becomes "Demise, King of Armageddon" while in the hand or on the field. Ritual Monsters you control cannot be destroyed...