Tulpa

The Tulpa is a mystic phenomenon from Shamanistic beliefs in Tibet. They’re created when a person’s thoughts collect and take astral form. This can be done intentionally or through subconscious thought during sleep or meditation. The form a Tulpa takes depends on the nature of the thoughts that create them, with violent forms creating a beastly creature. After existing for some period of time, the Tulpa becomes a completely separate entity. These Tulpas can become strong enough to be seen in dreams or on the physical plain.

Citations:

Tyson, Donald. Serpent of Wisdom: And Other Essays on Western Occultism. United States, Llewellyn Publications, 2013.