In the Codex, it was written that Buffy Summers would die at the hands of the Master and he would rise from his mystical prison — a prophecy that was technically fulfilled when the Master bit Buffy and left her to drown in a pool, with her blood giving him the power to escape the sunken church. The prophecy, however, was not fulfilled as expected, as Buffy was revived by Alexander Harris, and subsequently killed the Master minutes after he returned to the surface.
Further study showed that some obscure passages were actually Latin translated from a demonic tongue. These passages included references to bacchanals, as well as spells.
In an alternative universe, Buffy Summers traveled to Sunnydale at the behest of Rupert Giles in 1998. The Slayer faced the Master, who ruled Sunnydale after breaking free of his prison, in battle but was overpowered by the ancient vampire, who snapped Buffy's neck, killing her instantly and fulfilling the Pergamum Codex's prophecy.