In fact "The Rebirth of Ancient Ones" are the two demos of Sanctifier, one still launched under the old name Hellspawn. The first three songs are the first demo "Ad Perpetuam Rei Memoriam" which has the songs "The Cycle of the Entity", "Unholy Ancient Masters", "Archon Daimôniom ton", originally released in 93 and the following two songs are the second demo "Hymns of Hipocrisy" which has the songs "Hymns of Hipocrisy" and a new version of "The Cycle of the Entity", this second demo was released in 95.