Battle of the Crippled Mountain

The Battle of the Crippled Mountain was the last battle the dragonborn slaves of Skelkor fought before they gained their freedom.

History
After a decisive victory in a previous battle, the rebel dragonborn leaders Iskara and Shurideh had gained a powerful artifact known as the Eye of Blazing Rorn, after felling its previous owner, the silver dragon Asativarainuth. The two dragonborn sisters joined forces with the leaders of other rebel war bands, in order to kill the most powerful of the dragon tyrants of Abeir, the red dragon Rhodrolytharnestrix.

They went to the Celestial Mountain, a dormant volcano were Rhodrolytharnestrix had his lair, and opened a tunnel to the lava chambers using the Breath of Petron. While the rest of the dragonborn leaders led their war bands against Rhodrolytharnestrix's dragon army, Iskara, Shurideh, Reshvemi, and Thuchir infiltrated the mountain and dropped the Eye of Blazing Rorn in the volcano, triggering an eruption so powerful that it killed Rhodrolytharnestrix, even if he was a red dragon.

Aftermath
The Celestial Mountain was destroyed, and was called the Crippled Mountain since then. The dragonborn heroes survived the explosion and reunited with the other rebel leaders, creating the dragonborn nation of Tymanchebar. The ash from the eruption fell during forty days, and the dragonborn began to call themselves the "vayemniri" (Ash-Marked Ones, in draconic), so that they shall always remember the way they gained their freedom.