Aile Noire - Décomposition le Vent Néfaste SHVI-FR017

Once per turn, during the End Phase, if this card is in the Graveyard because it was sent there this turn, inflict 1000 damage. When this card is Normal or Special Summoned, you can target 1 "Blackwing" monster you control, then activate 1 of these effects: Increase its Level by 1. Decrease its Level by 1. You can only use this effect of "Blackwing - Decay the Ill Wind" once per turn.