Gandora the Dragon of Destruction (CT07-EN020) [2010 Collectors Tins]

This card cannot be Special Summoned. During your Main Phase, you can pay half your Life Points to destroy, and remove from play, all other cards on the field, and this card gains 300 ATK for each card destroyed this way. Send this card to the Graveyard during the End Phase of the turn it was Summoned.