Wamphyri

The Wamphyri are an extraterrestrial vampiric race that comes from the dimension known as "Starside/Sunside". They are leech-like parasites that bonds with hosts and grants them a infinite lifespan and supernatural abilities such as: telepathy, ESP, shapeshifting, superhuman strength and speed, and the need to sustain it all by consuming blood.

Biology
The Wamphyri leeches in their true forms resemble worm-like creatures with snake-like bodies and shovel-like heads, and fanged mouths.

Once the leeches bond with human hosts, their human hosts will posses pale skin, red eyes, fanged teeth and clawed hands and feet.

If the leeches bond with canine animals (such as wolves or foxes), they create Werewolves (vampiric wolves able take human-like forms to lure preys towards them).

Appearances

 * Brian Lumley's Necroscope series