I gotta say, I like this one a lot. For some reason, I'm finding myself imagining a deck with this, Twin Universe, and a weapon(s) of choice (plus, perhaps, Animate Weapon). Of course, that's two colors minimum (more likely three or more, since the best weapons for this are in neither

nor

), so... yeah.
I'm having a little bit of a hard time seeing why it gets extra HP from Endow, but that's purely a matter of image -- doesn't seem OP or anything.