Swap Frog [OP03-EN001] Ultimate Rare Fiend by Tributing 1 Thunder Effect

by Tributing 1 Thunder Effect non-Fusion Monster (in which case you do not use "Polymerization")

Set: OTS Tournament Pack 7 Card type: Fusion/Effect Monster Rarity: Common Attack: 2600 Defense: 1200 "Barrel Dragon" + "Blowback Dragon" Once per turn: You can toss a coin 3 times and destroy as many monsters on the field as possible

(This Special Summon is treated as a Fusion Summon

Set: Astral Pack 8 Card type: Normal Monster Rarity: Common Attack: 1200 Defense: 1300

they must accept the handshake

Swap Frog [OP03-EN001] Ultimate Rare Fiend by Tributing 1 Thunder EffectSet: OTS Tournament Pack 3 Card type: Effect Monster Rarity: Ultimate Rare Attack: 1000 Defense: 500 You can Special Summon this card (from your hand) by discarding 1 other WATER monster. When this card is Summoned: You can send 1 Level 2 or lower Aqua Type WATER monster from your Deck or face up from your field to the Graveyard. Once per turn: You can return 1 monster you control to the hand; you can Normal Summon 1 "Frog" monster during your Main