King of the Swamp (AST-082) - Ancient Sanctuary 1st Edition

You can substitute this card for any 1 Fusion-Material Monster. When you do this, the other Fusion-Material Monster(s) must be the correct one(s). Discard this card from your hand to be Graveyard to add a Polymerization Spell Card from your Deck to your hand. The Deck is then shuffled.