This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Hypnalis (Medieval Bestiary)
The hypnalis is a legendary creature described in medieval bestiaries. It is described as a type of asp that kills its victim in their sleep. "Cleopatra placed it on herself (at her breasts) and thus was freed by death as if by sleep." hile more creatures can invade the dreams of others, only these white cobra’s can kill its victims within their own dreams.
Even a little drop of their poison can cause a very long slumber, though a full dose of their poison will guarantee an endless coma that only powerful spells can break. The Sinlord of Sloth is sure to have some Hypnalis slithering around for pleasure, but Nue, Incubi and Boo Hags sometimes invade dreams with Hypnalis familiars.