Nasus Ability (LoL): Spirit Fire

After a brief delay, a target area becomes desecrated for 5 seconds. Enemies caught in the area when the desecration occurs are dealt an initial burst of 50 / 80 / 110 / 140 / 170 (+60% of ability power) magic damage. Additionally, enemies in the area are dealt 10 / 16 / 22 / 28 / 34 (+12% of ability power) magic damage each second and have their armor reduced by 30 / 35 / 40 / 45 / 50% while in the area and for 1 extra second.