Dark Magic Attack [DTP1-EN014] Common 2007 Collectors Tin this card loses ATK equal

this card loses ATK equal to the difference

30 Commons

Once per turn: You can destroy as many Special Summoned Effect Monsters on the field as possible with ATK less than or equal to this card's (other than this card)

Set: Dark Revelation Volume 3 Card type: Normal Trap Rarity: Super Rare Attack: 0 Defense: 0 Discard 1 card from your hand

then if its ATK has been reduced to 0 as a result

Dark Magic Attack [DTP1-EN014] Common 2007 Collectors Tin this card loses ATK equalSet: Duel Terminal Preview Card type: Normal Spell Rarity: Common Attack: 0 Defense: 0 Activate only while you control a face up "Dark Magician". Destroy all Spell and Trap Cards on your opponent controls.