Stormstfyr

Stormstfyr, also reffered to as The Bane of Winterstorm, is an ancient sword forged by Aeron in the Fires of Solthir to prevent Xenthyr, the Crystal Dragon, from awakening and bringing about Erndmyr, the Great Winterstorm. It possesses to ability to destroy the celestial elements of a being including those of a god.

History
Stormstfyr was forged by Aeron in the Fires of Solthir to stop the rise of Xenthyr during the Elven Rebellion. It was given to Arin the White, the king of man to stop Mordelenthriel from awakening the Crystal Dragon. Arin was not strong enough and died attempting to use the sword, which caused Xenthyr to sleep. This causes Aer to awaken and he banished the gods to Aerith where they are unable to intervene with Maerir. The sword was taken by Kvthmor, who was also chosen to weild the blade and returned it to Aeron after the death of Arin. The sword was sealed in Halgaard Deep until the death of Kvthmor, who gave the sword to king Ohrian and was taken to Elromir. The sword was found by Aronei, who used it to lay seige to Aergir and kill numerous gods. The sword was also briefly used by Aerion, who was able to weild it due to the Twin Star Prophecy that allowed Aerion and Aronei to be one soul that was tethered in two bodies. After Aronei and Dargorn were cast from Aerith, Stormstfyr was lost on Ethoras until it was discovered by Argon. It was used to end the first Holy War, and was once again sealed inside Ilnir, where it would stay until Erudan would claim it during the War of Shadows.