Crimson Rune - amplifies the molten arrow, widening the fire and doing more damage but makes the range shorter(width and damage increase with rune level)
Indigo Rune - the Molten Arrow, in stead of leaving a path of fire, fires off an intense moving fire wall that deals much more damage as it passes but leaves no trail behind(width of fire wall and damage increase with rune level)
Golden Rune - makes the path longer and reduces the resource cost(probably hatred)(length and resource reduction increase with rune level)
Alabaster Rune - causes the rune to have a much narrower path but after hitting a target chains to a new target leaving a new narrow fire path(number of targets increases with rune level)
Obsidian - any enemy who dies while on the path explodes creating a small, short-lived starburst effect of fire that has the same effect as the fire path(size of starburst effect increases with rune level)
Indigo Rune - the Molten Arrow, in stead of leaving a path of fire, fires off an intense moving fire wall that deals much more damage as it passes but leaves no trail behind(width of fire wall and damage increase with rune level)
Golden Rune - makes the path longer and reduces the resource cost(probably hatred)(length and resource reduction increase with rune level)
Alabaster Rune - causes the rune to have a much narrower path but after hitting a target chains to a new target leaving a new narrow fire path(number of targets increases with rune level)
Obsidian - any enemy who dies while on the path explodes creating a small, short-lived starburst effect of fire that has the same effect as the fire path(size of starburst effect increases with rune level)