Elder Spirit
Mysterious, long-lived entities whose exact nature is unknown (and possibly unknowable). The Elder Spirits were venerated in the Pylistroph and before.
The physical appearance of an Elder Spirit is a subjective matter: usually, they appear to be the same race as the viewer. In many recorded instances, two or more viewers of different races have seen the same Elder Spirit appear as two or more races at the same time. Physical recordings of Elder Spirits generally retain this same property, otherwise they show only fuzzy, indistinct images.
The Elder Spirits as a whole seem to demonstrate rather high-level psi abilities, including teleportation, psychokinesis, and clairvoyance. Individual Elder Spirits also have specific psi-like talents related to their major attribute(s), i.e. Yx displays pyrokinesis.
List of the Elder Spirits and their areas of concern.
The Elder Spirits claimed to have come to this universe from another plane of existence, to which they would one day return.
Throughout history, various Elder Spirits have, indeed, withdrawn from the Universe and passed to another plane of existence, in successive waves. The time of their withdrawal is given in the list and is sortable.