Bloodsipper
Bloodsipper is a term used in folklore and mythology to describe a creature or entity that sustains itself by consuming the blood of living beings. While the specifics vary across cultures and stories, the core concept remains consistent: the creature inflicts harm or death upon its victims to draw sustenance from their life force in the form of blood.
The most well-known archetype of a bloodsipper is the vampire. Legends of vampires span many centuries and