Jack's Knight [DR04-EN065] Rare Ultimate Rare but its original ATK becomes

but its original ATK becomes 0

Set: Shonen Jump Magazine Promos Card type: Xyz/Effect Monster Rarity: Ultra Rare Attack: 3200 Defense: 2300 3 Level 8 monsters Once per turn

Set: Duelist League Promo Card type: Normal Spell Rarity: Super Rare Attack: 0 Defense: 0 Destroy all face-up Rock-Type monsters on the field

The Special Summoned monster gains ATK equal to its original ATK

you can send this card from your hand to the Graveyard during the Damage Step to have that monsters gain 1400 ATK until the End Phase

Jack's Knight [DR04-EN065] Rare Ultimate Rare but its original ATK becomesSet: Dark Revelation Volume 4 Card type: Normal Monster Rarity: Rare Attack: 1900 Defense: 1000