This looks like a rare to me. Resplendent Mentor was pretty good in the right deck, and this is cheaper, less restrictive in who it gives the ability to, and doubles up on the lifegain itself.

Edit: Oops, missed that this wasn't in the skeleton. Silly me, never mind :)

This keyword is my suggestion for a blue-green evergreen keyword, as seen on Algae Creeper. I might actually like unbound better as a name, though.