User blog comment:Purehito/What is your favourite magic and what magic would you like to see in the next FT arc?/@comment-5782007-20130626093822/@comment-7418318-20130626095614

Isn't Zero's (and later Brain II's) magic pretty close to Chaos magic already?

Or do you mean something more akin to D&D's wild magic, where the outcome can be replaced by a random effect, depending on your luck with the dice?