Maokai Ability (LoL): Vengeful Maelstrom

Maokai shields his allies by drawing power from hostile spells and attacks, reducing non-tower damage done to allied champions in the area by 20%. Maokai can prolong the effect for 10 seconds, as long as he has mana to spend on it (Upkeep Cost: 30 mana per second). When the effect ends, Maokai unleashes the absorbed energy to deal 100 / 150 / 200 (+50% of ability power) (+2 bonus damage per damage absorbed) damage to enemies within the vortex. Maximum 100 / 150 / 200 bonus damage.