If you want a crazy change to Volibear ult to go along with all the others, I've got something.
Thunder Paws
Initial Damage: 4 nearest targets >> ALL units within 500 units.
(NEW) Ursine Taser: Any unit damaged by Thunder Paws is stunned for 0.1 seconds.
(NEW) Charge: Any unit who has been damaged by Thunder Paws once will be marked. Marked enemies are guarunteed to be hit by the lightning strikes if they are within 500 range of Volibear or his target when he swings. This mark falls off after 5 seconds of not being damaged by Thunder Paws.