Azarath

Over 900 years ago, the followers of Azar were led to a place between all dimensions where they founded the Temple Azarath. It was Azar's plan to expel all evil from the Azarathians so that the demon Trigon could use the dark energy to be fully re-established, and then Azar could finally kill him once and for all.

The dimension was destroyed by Trigon's forces when he finally got control of his daughter, Raven. However, all the inhabitants' souls survived, but were corrupted by the temporary merger with and destruction of Trigon. However after the events of the Titans Hunt storyline, they were purified and guided into another plane of existence by Azar. The souls that remained eventually became the second incarnation of Phantasm.