Snow Plow Hustle Rustle (SR10-EN015) [Structure Deck: Mechanized Madness]

When your opponent's monster declares a direct attack, while you control a card(s) in your Spell & Trap Zone: You can Special Summon this card from your hand, then destroy as many cards in your Spell & Trap Zone as possible, and if you do, inflict 200 damage to your opponent for each destroyed card. You cannot Special Summon any monsters, except Machine monsters.