Really rapid evolution, this is. Turn by turn change is too fast to be completely thematic imo. But still, I'd have a whole lot of fun with this. My Mutation deck would love it!
I like the idea of it and i believe something like this has been brought up before. i just guess it hasn't materialized into a card yet. I do believe that this will completely overshadow the normal mutation card though.
Does Pandemonium overshadow Chaos Seed?
so basically is a card that steals an spell and then makes it better than the spell by a lot? no me gusta, at all.