Hmmm. Kinda hard to use yourself to turn your thopters into big stuff, as you're likely to hit a thopter. And not often useful on an opponent, because they get a replacement of whatever it was you feared and red can outright kill them for cheaper.

It's interesting though; makes me want to run a deck half stuf with bottle gnomes and half with ridiculous cost stuff. So I think it's a hit.

Isn't this just Shape Anew? Which is of course just an artifact Polymorph, and abusable the same way Polymorph was: play artifact tokens (Master's Call) or other things which can be artifacts in play but not in the library (Blinkmoth Nexus).

Oh, yes. Forgot there were ways to get artifacts that aren't artifacts :)