Elemental Hero Thunder Giant [DR3-EN216] Ultra Rare Dark Beginning 1 If Summoning an "Invoked" Fusion

If Summoning an "Invoked" Fusion Monster this way

Special Summon those targets

or "Duoterion" in your GY

except "Atlantean Dragoons"

then Special Summon that Fusion Monster from the Extra Deck

Elemental Hero Thunder Giant [DR3-EN216] Ultra Rare Dark Beginning 1 If Summoning an "Invoked" FusionSet: Dark Revelation Volume 3 Card type: Fusion Effect Monster Rarity: Ultra Rare Attack: 2400 Defense: 1500 "Elemental Hero Sparkman" + "Elemental Hero Clayman" This monster cannot be Special Summoned except by Fusion Summon. Once per turn, by discarding 1 card from your hand, select and destroy 1 face up monster on the field with original ATK less than the ATK of this card.