Do you like Fire Mages? No NOT those fire mages, the real Fire Mages!
Bouncing Flames
Every time you cast <Fireball> there's a (%chance) that it bounces to a nearby target, this chance carries over to up to (x / 4 ) times, each consecutive bounce increases the damage dealt by (x%) If this ability is critical strike, instead guarantee the initial bounce and explode on the first target hit for AOE damage.
Bouncing Flame can not occur more then every (X) seconds, and Bounces do not Critical Strike past the initial first Bounce.