Outcast from merfolk society, Marlin answered the call of The Abyss. In exchange for his servitude to The Abyss, Marlin was gifted powerful magic. But this pact would take a toll on his body, darkening his red scales and sprouting gnarled horns.
He tried to keep the source of his magic a secret, but it would only be a matter of time before it was discovered. And when it was, The Abyss ordered Marlin to take up an eldritch scepter and rain terror across the seas.