3 "Thunder Dragon" monsters Must be either Fusion Summoned, or Special Summoned by banishing 1 Thunder monster from your hand and 1 Thunder Fusion Monster you control, except "Thunder Dragon Titan" (in which case you do not use "Polymerization"). When a Thunder monster's effect is activated in the hand, even during the Damage Step (Quick Effect): You can destroy 1 card on the field. If this card would be destroyed by card effect, you can banish 2 cards from your GY instead.