Deep Sashelas was an elven deity who made his home on Arvandor, although he was rumored to maintain a demesne off the coast of the Moonshae Isles known as Tír faoi Thoinn. He was heavily involved with the lives of the sea peoples and spent most of his time with deities from that realm. He gave one group of Corellon's creations the ability to breathe and live underwater, wishing to see the wisdom and goodness of the elves prevail in the deeper and wilder realms of the sea. He was heavily involved in the constant reshaping of the ocean depths, creating reefs and islands, tinkering with undersea volcanoes and the like.
Deep Sashelas was a political deity; he made considerable efforts to maintain the unity of the Asathalfinare and was on good terms with non-evil human sea and water deities. He had a special enmity for Sekolah, the sahuagin god and for Panzuriel whom he helped banish and weaken.
Deep Sashelas' priests had many responsibilities. They acted as mediators and befrienders of non evil aquatic races and protectors of dolphins. All priests had to take a dolphin companion to progress through the ranks of priesthood. They also had to make some effort to establish and maintain contacts with land-dwelling elves if this was feasible. Finally the priests were responsible for creating and maintaining airy caverns below the sea and finding locations which could be used in this way.
While Deep Sashelas was as chaotic as any elven god, he had a lawful good consort, the dolphin goddess Trishina. Sashelas was infamous for his conquests and amorous exploits. Trishina had some tolerance for such straying but not too much.
Swim the great currents and the shallow seas. Exult in the everchanging beauty and life of the bounteous Undersea. Revel in the joy of creation and increase its myriad aspects. Seek not to hold that which is everchanging, but instead love the change itself. Seek out fellow swimmers who honor the ways of the Lord of the Undersea, and ally with them against those who see only the darkness of the deeps. Follow the way of the dolphin. Promote knowledge and use of the sea by reasonable folk, and fight those who would taint or deplete its beauty and bounty.