The overall consensus with this card is that it's fairly mediocre. The idea that you can steal a 4-drop on turn five is pretty decent. If you're already playing other cards that provide energy, which is a good chance in this set, this gets even better since you don't necessarily have to spend the full 4 energy this gives you to steal something. I see Confiscation Coup being very solid in Limited, and it may be playable in Standard in some Control decks. It all depends on what there is worth stealing indefinitely. This is probably a bulk rare, but it's one of the more interesting Control Magic variants that we've seen. Plus, it works into the energy counter plan about as well as anything.