Shoots thorn of hell to an enemy in the rear and deals magic damage equal to (50/120/250)% of the Hero's attack power. A flame stack will pile up equal to (1/2/3).
An enemy damaged by Thorns of Hell is lit on the fire and receives neutral damage equal to 50% of the hero's attack. When this effect is stacked 4 times, the hero shoots a flame arrow that deals magic damage equal to 350% of the hero's attack. (Active once every 3 seconds)