Meh, the only HP that matters is 1. Controlling the board matters a lot more than having more HP, and from looking at the Rogue cards, it seems that they'll be more aggression focused and won't need to use this. This would have been nice to see in Wulfen with the original Darkclaw effect though.
I need to find time to play on the test server and see if I'm right or wrong about this card. :X