Hydroloth

Hydroloths, also known as hydrodaemons, were amphibian yugoloths that inhabited the River Styx.

Description
Hydroloths resembled grotesquely squat humanoid amphibians with frog-like faces. They had flaps under their arms that they could use to glide. Their yellow skin was covered in warts.

Personality
Like all yugoloths, hydroloths were ambitious and greedy. They exploited the prestige they enjoyed for their underwater prowess to gain power and influence.

They were also highly motivated fighters who enjoyed serving in the Blood War, mainly for the terror it inflicted on mortals.

Combat
Like the river they inhabited, hydroloths also stole their victims' memories by merely focusing on them from a distance. A creature whose memories were lost to a hydroloth became a mere husk, incapable of even the most basic tasks, unless the effect could be resisted, after several days of recovery, or upon the casting of a remove curse or greater restoration spell.

In addition, hydroloths could also attack with their claws and bite and could innately produce the effects of spells such as control water, crown of madness, darkness, detect magic, dispel magic, fear, invisibility, phantasmal killer, suggestion, and water walk. Some hydroloths were known to also be capable of spitting a yellow sleep-inducing poison produced at the back of their tongues.

They were also capable of teleporting into a limited distance at will.

Society
Hydroloths were adept at finding lost objects. They were frequently hired to locate items that had sunk into the depths of the Styx.

Accomplished underwater combatants, hydroloths also offered their services as raiders of ships and coastal villages.

Ecology
Hydroloths, amnizus, and merrenoloths were the only creatures known to be immune to the deleterious effects of the River Styx.

Their body parts could be used as material components of numerous spells and potions.