This isn't a great card, but considering we just had a reprint of Eternity Snare, this is pretty good in comparison. The main advantage of this card is that it only costs 1. It does allow for untaps, but it's only every second turn, which can make a huge difference in a lot of games. It's pretty useless against those utility creatures you want to tap down, but against attackers, it's pretty decent.
Pros: Frosts a creature, costs 1
Cons: Only frosts after attack, useless against utility creatures