Steal would be interesting with this. 50% chance of no additional effect, 50% chance extra steal.
Or will it give your permanent to your opponent?
Also, as somewhat mentioned, makes TU much stronger. But I highly doubt TU decks would become too competative, so that isn't too much of a fear (hopefully. Or it just makes everyone run mono death poison decks, or chrysora spam).
Other fun thought: Has some built in protection, where your opponent might be too afraid to deflag it.