yugioh the agents deck Yu-Gi-Oh! - Agent of Miracles - Jupiter (SDLS-EN003) - Structure Deck: Lost Sanctuary - 1st Edition The Agent | Yu-Gi-Oh! Wiki

GX: Set in the Duel Academy, the series follows aspiring Duel Monsters champion Jaden Yuki and his friends as they navigate the trials and tribulations of school life while participating in high-stakes card duels

Chthonian Polymer X TRAP Activate only when your opponent Fusion Summons a Fusion Monster

Although this Deck Master explained to Serenity that her ability allowed a Fusion Summon without needing "Polymerization" (albeit with the cost of discarding 1 Spell Card), she never specified the locations of the necessary Fusion Materials

The issue with this strategy is that two specific cards are required for these powerful monsters to be summoned