Honestly, wtf, seriously, how come Charlotte isn't kicked out of the school immediatly? Who the fuck sacrifices their own arm to use magic against a 10 year old, sure she might have compatibility 9999 and all that, but that's the kind of shit you're supposed to use in the final fight against the...
Personally, as they mentioned this fate value so much, i believe his power could be considered to set any fate value to 0 or null even, basically if a persons fate value becomes 0 they can no longer cause an impact on the world, so living people will just die because they are no longer capable...