Bonus tracks includes 1986 demo and "Insurrection" taken from the 1987 Music for Nations compilation Speed Kills III: A Catalogue of Destruction.
Sacrilege's second full-length deserves definitively more affection and attention. As far as I can see, "Within the Prophecy" is one of the few albums that possess really unique features. "Within the Prophecy" has a fatalistic touch from the beginning to the end. I guess that Satan himself lists this album in his torrid top ten. Therefore, it may be a good idea to look for the phone number of your local exorcist after having listened to this output. But first of all, listen very closely and enjoy the songs.