The Claw of Hermos
(This card is always treated as “Legendary Dragon Hermos”.) You can only activate 1 “The Claw of Hermos” per turn. Send to the Graveyard 1 Material monster listed on a Fusion Monster from your Extra Deck that can only be Special Summoned by “The Claw of Hermos” from your hand or field (if that monster is Set, reveal it). Then, Special Summon that Fusion Monster from your Extra Deck.