Volcanic Rune is a skill located in the Mages Guild (which can be found in the Guild skill tree). Volcanic Rune is a morph of Fire Rune
Volcanic Rune deals the following types of damage: Flame Damage. Which means that it gets buffed by the following blue champion point trees: Elemental Expert, Elf Born, Master at Arms, Spell Erosion. Also the following red champion point trees protect against this skill: Elemental Defender, Iron Clad.