Thoughts are the force that turns Ether into matter.
Introductory class to magic - World and time unknown
When enough people invested with Ether believe, even subconsciously, in a being, it may come to life. Gods, demons, angels, spirits of nature and the night, even the witch hunting a village’s children may have once been only stories. This is a long process, often requiring generations of believers.
A being created through manifestation may not be destroyed by the absence of faith, but their power would greatly diminish.
The powers of such beings are dependent on their myths and will either be holy (for beings thought benevolent) or unholy (for beings through malevolent). In addition, they may include one or more of the primordial magics, creating combination such as Fire/Unholy or Order/Light/Holy (cf. Magic damages).