Breviloquent

One of the most unnoticeable subspecies of sincubus, breviloquents mimic humans almost perfectly.

Appearance
Breviloquents are some of the most subtle sincubi, and appear to the casual onlooker to be completely human. The single notable difference between a breviloquent sincubus and a human is its barbed tongue; breviloquents have a sharp, bony barb at the end of their tongues which they use to inject a paralysing venom into their prey. To maintain their illusion of humanity, breviloquents fold back the tip of their tongue. This behaviour makes them very difficult to detect, but does give them a slight lisp.

Behaviour
Breviloquents are not physically very strong, so rely on seduction to capture their prey.

A breviloquent sincubus allures their victim with a less overt mode of attraction, often ensnaring people working in gender-dominant work environments. They understand that people who are less exposed to the opposite gender are usually more sexually vulnerable, and thus will more easily succumb to infatuation.

When a breviloquent engages in a kiss with their victim, they slip their tongue into the victim’s mouth and inject a potent form of poison. This poison acts as a mental anticoagulant, loosening the victim’s morals and causing its brain to release dopamine which makes it unreasonably happy.

After the poison has been injected, the breviloquent feeds on the victim’s potential energy.

The victim does not die, but instead spends the rest of the day feeling exuberant because of the breviloquent’s poison. After approximately twelve hours, the poison begins to wear off, and the victim becomes more and more lethargic and depressed. As the victim progresses through its life - which has been rid of all potential energy - they find they cannot move and cannot think for lack of energy. The victim goes insane inside its immobile body over a period of one to six months.