Xerath Ability (LoL): Eye of Destruction

Xerath calls down a blast of arcane energy, which strikes after a 0.5 second delay dealing 60 / 90 / 120 / 150 / 180 (+60% AP) magic damage and slowing enemies in a target 200-radius area by 25% for 2.5 seconds.

Enemies hit directly take 100.02 / 150.03 / 200.04 / 250.05 / 300.06 (+100.02% AP) magic damage and are slowed by 60 / 65 / 70 / 75 / 80 % instead. The empowered slow decays down to 25% over the duration.