Arœkin and Dælla

When this creature enters the battlefield, choose
one that hasn't been chosen:
• It becomes a 4/2 legendary creature named
Aroekin with flying and mentor.
• It becomes a 3/3 legendary creature named
Daella with flying and haste.
When this creature is put anywhere but your
hand from the battlefield, return it to the
battlefield and it loses this ability.