Snow Plow Hustle Rustle

When your opponent's monster declares a direct attack, if you control a card(s) in your Spell & Trap Card Zone: You can Special Summon this card from your hand, then destroy as many cards in your Spell & Trap Card 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-Type monsters.