Son of Dagon

 is a challenging (&#128128;) dungeon boss in The Sunken City.

Description
A large mostly-fish creature with a blue head-light.

Attacks include:
 * a sudden, explosive lunge attack that does substantial damage
 * area-of-effect ground pound

Location

 * A room with a large, hanging, exposed fish-creature carcass in The Sunken City
 * The final chamber in The Sunken City alongside a Daughter of Dagon.