Sion has a 40% chance to ignore up to 30 / 40 / 50 damage each time he is hit by a basic attack. The damage reduction is calculated before armor and percentage damage reduction benefits are taken into account.
Active: Sion surrounds himself with a shield which absorbs damage for up to 10 seconds. After 4 seconds, if the shield has not been destroyed, the ability can be cast again to explode and deal magic damage to surrounding enemies. It will explode automatically after the 10 seconds have passed.
Both the initial cast and shield detonation have no cast time and do not interrupt Sion's previous orders.
The amount of damage dealt by the shield detonation is not dependent on the shield's remaining health; it will always deal damage equal to the maximum health of the shield.
Cost: 6 / 8 / 10 / 12 / 14 health per attack
Toggle: While toggled on, Sion has increased attack damage at the cost of some health for each basic attack. While Enrage is active, Sion permanently increases his maximum health whenever he kills a unit with either his attacks or abilities. This effect is doubled against champions and large units.