Vetala

Vetalas are a type of monster, almost beast / snake-like, that hunt in pairs so they can capture their prey. They don't usually hunt solo. They can be killed by being stabbed in the heart with a silver knife twisted to complete and effectively kill them.

Overwiew
A Vetala is a monster with an almost humanoid body, but a snake-like face and long arms. Vetalas can turn into human when they gain full capacity of their powers. Vetalas are also comparable to Vampire because of their fangs. Also, they can stand the daylight and that's why they only hunt at night. Vetalas live in a group of two and they hunt people and keep them hidden in their caves to feed on the person's blood for several days.

History
In Point of no Return... For Now, a pair of Vetalas hunt and kidnap two women, Rebecca and Harmony, and keep them on their cave. While Rebecca was saved, Harmony became food for them. Those two Vetalas were vanquished by Piper, Phoebe, Paige, Chris, and Melinda.

There might be more Vetalas out there.

Powers and Abilities

 * Fangs: A Vetala's razor-sharp teeth allow them to feed off their victims. Vetala attacks can sometimes be mistaken for vampires due to similar neck wounds that come from their feedings.
 * Super Strength : Vetalas are very strong and capable of overpowering fully grown men.
 * Venom: Vetala produces a venom that paralyzes and sedates its victims, allowing them to feed over several days.

Weaknesses

 * Silver Knife: Vetalas can be killed with a silver knife; stabbing the heart and twisting the blade to finish them off.

Lore
In Hindu mythology, a Vetala is comparable to the vampires of Western mythology. Reanimated corpses are used as vehicles by the spirits for movement, the corpse no longer decays while it is inhabited by a vetala. A vetala may possess and also leave a dead body at will.

Apearance
Vetalas have appeared in a total of 1 episode through the course of the series:

Season 1
 * Point of no Return... For Now

Credits

 * Supernatural Fandom
 * Wikipedia