Scalding Rune is a skill located in the Mages Guild (which can be found in the Guild skill tree). Scalding Rune is a morph of Fire Rune
Scalding 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, Thaumaturge. Also the following red champion point trees protect against this skill: Elemental Defender, Iron Clad, Thick Skinned.