Thunder Dragon Colossus [OP10-EN001] Ultimate Rare The Falsebound Kingdom ) During either player's turn

) During either player's turn

destroy all monsters on your opponent's side of the field

You can only activate 1 "Spellbook of Power" per turn

remove from play all monsters that were Special Summoned by this effect

Thunder Dragon Colossus [OP10-EN001] Ultimate Rare The Falsebound Kingdom ) During either player's turnSet: OTS Tournament Pack 10 Card type: Fusion Effect Monster Rarity: Ultimate Rare Attack: 2600 Defense: 2400 "Thunder Dragon" + 1 Thunder monster Must be either Fusion Summoned, or Special Summoned during the turn a Thunder monster's effect was activated in the hand, by Tributing 1 Thunder Effect non Fusion Monster (in which case you do not use "Polymerization"). Cards cannot be added from the Main Deck to your opponent's hand except by drawing them.