Imperious Perfect [Champs and States] Oath of the Gatewatch Promos Set: Antiquities Type: Artifact Rarity:

Set: Antiquities Type: Artifact Rarity: Rare Cost: {3} Whenever an artifact you control is put into a graveyard from the battlefield

Scourge of Kroog enters the battlefield tapped and doesn't untap during your untap step

you may exchange control of target creature you control that dealt combat damage to a player this combat and target creature that player controls

" —Ertai

For each of those creatures

Imperious Perfect [Champs and States] Oath of the Gatewatch Promos Set: Antiquities Type: Artifact Rarity:Set: Champs and States Type: Creature Elf Warrior Rarity: Rare Cost: {2}{G} Other Elves you control get +1 +1. {G}, {T}: Create a 1 1 green Elf Warrior creature token.