In all honesty, this card is just the Innistrad version of a much worse Control Magic, Treachery, Mind Control, and even Corrupted Conscience. It just fulfills the role of the Transform card that changes from a creature into an enchantment that we all knew was coming. It might see some play in Innistrad Draft just because it is still a 1/3 flier... I just don't see it being picked that highly, even in that format.
This one is going to have to take a little thought. There has to be a reason to run this card over more efficient fliers and/or more efficient control magic-type cards. There are only 2 things I see in favor of it:
- Its creature type is 'spirit.'
- It transforms.