Ephata

The vampire demon of Aramaic lore is called Ephata and appears as a shadow.
This one of the weirdest creations I’ve ever heard of. Ready?

When the body of the deceased doesn’t decay properly the soul is forced to stay with the body and is bound to to this world.

At night the spirit leaves its body and searches for humans to drain of blood. If its corpse is destroyed the Ephata will be released from the binding and can move to the next world.

Image from Google search

Habergies

This vampire demon shape-shift into an array of animals including a three legged bird.

While in animal form it attacks cattle and drinks its prey’s blood.
Hearing the cry of the habergies is believed to be a death omen