The Wicked Eraser

This card cannot be Special Summoned. This card cannot be Normal Summoned or Set except by Tributing 3 monsters. The ATK and DEF of this card are each equal to the number of cards your opponent controls x 1000. When this card is destroyed and sent to the Graveyard, destroy all cards on the field. During your Main Phase, you can destroy this card.

Fiend DARK Effect Monster 10 effect