wow!!! yeah this all really rules, and I ABSOLUTELY love the spirit of it! I know I have a lot of MTG cards I collected solely cause I like the art or the general theme of the set that I'll never play irl lol
Most everything you got I really vibe with, and I think slots in real easily! I think the power/stamina is a little confusing, or at least a little chunky at first glance, but I get that they're an important part of MTG cards so some conversion for them would be necessary! I don't have any suggestions atm but I'm excited to see where you'd go trimming it or expanding it!