Artifact Creature — Bird
Flying When Parasitic Strix enters the battlefield, if you control a black permanent, target player loses 2 life and you gain 2 life.
If you don’t control a black permanent immediately after Parasitic Strix enters the battlefield, its ability doesn’t trigger. If you don’t control one as the ability resolves, no player loses or gains life. It doesn’t have to be the same black permanent both times, however.