Mangara of Corondor

• WWizards of the Coast2021-03-19
  Official Ruling
  If Mangara leaves the battlefield before its ability resolves, the target permanent is still exiled. Mangara won't be exiled from the zone it's in.
• WWizards of the Coast2021-03-19
  Official Ruling
  If the target permanent is an illegal target by the time Mangara's ability tries to resolve, the ability doesn't resolve. You don't exile Mangara.

Rulings via Scryfall