Maxperson
Morkus from Orkus
Also, life force - whatever the hell that is - isn't a magical phenomon, but a fighter choosing to draw on his/her reserves so as to push him-/herself hard is?
The wizards used that life force and converted it to magical power. 1) Fighters don't convert anything to magic, and 2) a fighter drawing on reserves in a reasonable manner to push himself isn't something anyone here has objected to.