Emancipation Angel

• WWizards of the Coast2018-12-07
  Official Ruling
  For Emancipation Angel’s triggered ability, the permanent to return is chosen as the ability resolves. No player may take actions between the time you choose the permanent and the time it’s returned to its owner’s hand.
• WWizards of the Coast2018-12-07
  Official Ruling
  If Emancipation Angel is still on the battlefield as its triggered ability resolves, you may return Emancipation Angel itself.

Rulings via Scryfall