Archlord Kristya [SOVR-EN096] Secret Rare Vaccine but its original ATK becomes

but its original ATK becomes 0

Add 1 Tamer card or 1 Digimon card with [Gabumon] in its name among them to your hand

You'll have to assemble this star player from your discard pile (with the help of Professor Burnet)

Set: Cyberdark Impact Card type: Effect Monster Rarity: Ultra Rare Attack: 1500 Defense: 1500 Once per turn

Archlord Kristya [SOVR-EN096] Secret Rare Vaccine but its original ATK becomesSet: Stardust Overdrive Card type: Effect Monster Rarity: Secret Rare Attack: 2800 Defense: 2300 If you have exactly 4 Fairy Type monsters in your Graveyard, you can Special Summon this card from your hand. When you do, add 1 Fairy Type monster from your Graveyard to your hand. Neither player can Special Summon monsters. If this face up card would be sent from the field to the Graveyard, it returns to the top of the owner's Deck, instead.