I sort of get where majofa is coming from, because it is a simple mechanic which already exists in the game, but I'd still be excited to play the card. Everyone loves mutants but few decks work well that try to utilise them.
I think it's balanced well, and the implementation of the mechanic is somewhat interesting.
Fippes other ideas from pad:
The other one I like is the Ash Eater, though maybe a different buff for eating an ash as it's somewhat situational, also the upgraded one isn't vanilla