Tulpa / egregore

Idea of a 'thought-form' that gains autonomy; cited to explain some high-strangeness entities.

In traditions of mysticism and the paranormal inspired by Tibetan Buddhism, a tulpa is a materialized being or thought-form, typically in human shape, that is usually created through spiritual practice and intense concentration. The term is borrowed from the Tibetan language. Modern practitioners, who call themselves "tulpamancers", use the term to refer to a type of willed imaginary friend whom practitioners consider sapient and relatively independent. Modern practitioners predominantly consider tulpas a psychological rather than a paranormal phenomenon. The idea became an important belief in theosophy.