My opinions...
Erdnase: Moved your left hand a bit much - though this may be personal preference, but it looked a bit jerky. Third one was good in this respect. Also, the reveal was about as unmagical as it could be, too quick.
Winter: Now THAT is the sort of reveal I'm talking about. The first one was good, second one, same as above. Depending on hand size you could probably try palming it a little lower and opening more of the fingers, that's one of the biggest appeals of the Winter Change for me.
Ego: Nice work, very clean.