Maelrawn

Maelrawn, or Maelrawn the Tentacular, is an abyssal god that lives in the ocean depths. He is described as having tentacles, and likely resembles a giant cephalopod. During the battle at the Trembling Isle, Maelrawn was summoned by. With his tentacles, Maelrawn churned the water and wind, and destroyed the two opposing fleets of the Claddish Navy and the Demons of the Cataract.

Tidehunter calls Maelrawn the "Lurker in the Whirlpool".