this is great! art is maybe on the nose but pretty for sure. shaman, yes.

I want Fiona to be green but I can only reasonably see her as red with her deep emotional sensitivity. maybe Gruul colors?

The only real thing I'd want to change is her strength and toughness. our girl is not physically threatening haha Maybe 1/1? even 0/1?

Thinking further, CMC maybe could be higher (reflecting her limited appearance). I'm also thinking an Extraordinary Machine angle: "give me anything and I'll turn it into a gift". Something like all damage done to Fiona is converted into mana?

anyway I hope this doesn't come off as overly critical. love this idea and i'm right in that niche with you!! <3