Dionamus the Healer, once known as the mortal Shaothne, rose to Vernal Ascendancy from the White Shell in the lost city of Alabellalum, and was the first to make contact with the Cosmic Plane of Celestia. With His encouragement, the Holy Supernals actually contributed to the fight against the Soulless during the Vernal Wars, despite never being directly attacked in Their homes on the higher planes. Perhaps as a result of His connection to Celestia, He often appeared to mortals in an angelic form, and was widely worshipped throughout the Basin of Life during His life.
Dionamus was not as well-liked by the other Vernal Gods, though. He and Urlach were openly hostile to each other and would have torn the Council of Nine apart if it weren't for the mediations of Juliana, one of Dionamus' closest allies, who helped Him trap Zenos in a prison of ice during the final days of the War.
To imprison Kethuru and end the Vernal Wars, Dionamus sacrificed Himself, giving birth to Avechna the Avenger, and became the Seal of Life.