God machine
God machines, sometimes known as Titans, are large scale sapient artificial intelligences comprised of a series of computational nodes stored in megastructures. They vary in size from a single planet, to whole star systems, whole galaxies, and at one point, the entire universe. Sometimes, these minds are created from scratch, but other sources are used such as that of an organic life form.
God machines are in essence massive scale quantum computers. They function by projecting their computational structure through the use of a series of quantum entanglement and tachyon-based signals that manipulate electromagnetism. The manipulation of EM waves and gravitons allows them to create holographic projections and communicate with organic species, either through a physical apparition or telepathically by interacting with the life form's thoughts. While older god machines have a central processing core, more sophisticated models are decentralized so that it can continue to exist so long as at least one dedicated node still remains operational.