Looking back at this card again, I think that at least the unupped version could use a little more HP. Granted,

has access to plate armor for buffs, but it would be nice if it could stop more than just a 1 attack creature without it.
Also consider the fact that sending a targeted creature back will effectively only allow you to block a particular target's damage every other turn, since it still gets to deal damage the turn it is played... Althoug the opponent will need to spend a lot of quanta to recast it.
Lastly, you will still need to heal this card if you want to stop the same creature when comes back again. Thus, I think a couple more HP on the unupped (or even both versions for that matter) wouldn't hurt.
Just my 2

.
Other than that I think its a pretty sweet card.