Neptulon

Neptulon the Tidehunter is the Elemental Lord of water. Much like the other three, in ages past he battled against the Titans as a servant of the Old Gods. However, he did not ally himself with Deathwing after the Cataclysm, and as a result, the naga and faceless ones, servants of the Old Gods, sought to capture him and the Abyssal Maw. Neptulon would later break free of his captor, Ozumat, and return to the Abyssal Maw.