Personally, I think that what is sacrificed/powers gained shouldn’t be so random nor fit so nicely with what they’ve lost. For example, losing legs but gaining levitation–is it really a sacrifice (in practical terms no, but in appearances yes)? Plus you miss out on a chance for conflict and hardship. As for making it a little less random, perhaps people can’t choose what they lose or gain, but the fire picks up on some aspect of that persons desires/personality/whatever and that determines what happens. It would seem random and would still be unpredictable, but (like a lot of things in life) have workings going on behind everything that we (reader, your characters, etc) just don’t understand.

Well done though. A very interesting magical system.

I am kind of confuesd about priests though– like a religious priest? Because priest is a word specific to christianity so you might want to come up with a diff word, unless you want it to be christian priests.

Instead of changing the who and how of magic, change it’s very fundamentals.

actually though, ed losing his limbs and al losing his body was a mistake… as you said :p

btw: egyptians had priests…. that word is not specific.