Volibear gains 1 stack of The Relentless Storm whenever he damages an enemy with basic attacks on-hit and abilities, up to a maximum of 5. The Relentless Storm lasts for 6 seconds, refreshing whenever Volibear gains a stack. At maximum stacks, he gains Lightning Claws.
The Relentless Storm: Volibear gains Attack speed icon 5% (+ 50% bonus Ability Power) bonus attack speed per stack, up to 25% bonus attack speed.
Lightning claws: Volibear's claws ignite with lightning, causing his basic attacks on-hit to deal 11 - 60 (based on level) (+ 50% bonus Ability Power) bonus magic damage to the target and the closest Sight icon visible enemy within 450 units of the target, chaining up to 4 subsequent targets.