Elemental Storm is a skill located in the Destruction Staff (which can be found in the Weapon skill tree). Elemental Storm is an ultimate. Elemental Storm is a base skill, and can be morphed into Elemental Rage
or Eye of the Storm
Elemental Storm deals the following types of damage: Magic 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.