Somnacanth

Description

A bellicose Leviathan that lives in the water and spreads soporific
dust via its neck gills and tail to ensnare prey. When seen under
the moonlight, it is said to resemble a maiden or mermaid.

A sleep-inducing substance contained in this monster’s bivalve prey
accumulates in the body and reacts with microbes to form a glowing
powder visible in the countless gills of its mouth, neck, and tail.

Although the appendage on this monster’s head looks like little
more than a purple fin, it is actually lined with countless spikes
that can be released like arrows in a ranged attack.