Scion of Ice

Errevon, Scion of Ice, is an elemental titan prince and member of the Elemental Scions. A gigantic figure of icy glass and frigid mist, constantly mainfesting frost as the humidity of the nearby air plummets to freezing temperatures. Errevon led their army of cold snap spirits, frost salamanders, ice mephits, rime hulks, and water elementals. Their fury was directed towards Syngorn and Kymal, carving their dominion over a forest now known as the Frostweald from which their elemental forces could further expand.
The last of the Scions to reveal themselves, the Scion of Ice greedily carved their own dominion on Exandria by building a full citadel of glass glaciers and casting their magics upon the forest now known as the Frostweald. After attempting to invade the city of Syngorn and being repelled by the city's Verdant Guards, the Scion instead conquered the city of Kymal and dismantled its already struggling hierarchy. 
As their siblings began to fall across the continent, and especially after noticing the encroaching elven armies coming to liberate Kymal, Errevon chose to pull back their forces and strengthen their domain. Ultimately, this frigid elemental titan was the last of the Scions to maintain a hold on Exandria, repelling the Tal'Dorei resistance for seven long years. Ultimately, the combined armies of Tal'Dorei, Syngorn, and Kraghammer were successful in dismantling the Scion's fortress, and forever sealed the elemental prince away in its Elemental Plane with the help of the Air Ashari druids.