Ruin Rat [Hour of Devastation] Uncommon and your opponent's LP is

and your opponent's LP is at least 3000 higher than yours: You can make this card gain 3000 ATK

/ Which tells us the way to go

" card or effect that targets a card your opponent controls (except during the Damage Step) (Quick Effect): You can target 1 face-up monster your opponent controls

Set: Structure Deck: Seto Kaiba Card type: Normal Monster Rarity: Common Attack: 1900 Defense: 1600

Set: Khans of Tarkir Type: Creature — Human Warrior Rarity: Uncommon Cost: {1}{W} Prowess (Whenever you cast a noncreature spell

Ruin Rat [Hour of Devastation] Uncommon and your opponent's LP isSet: Hour of Devastation Type: Creature Rat Rarity: Common Cost: {1}{B} Deathtouch When Ruin Rat dies, exile target card from an opponent's graveyard. From every shadow came the dull scratch of teeth on bones.