Mysterious chronicle (part 24) is a book found only in Daemonheim. It may appear in front of the dungeon-ending ladder after killing the boss monster.
It was written in the year 5 of the Fifth Age. Bilrach reaches the area now known as the Warped floors, and his magic carves through it like a saw through flesh. He thinks he has been rewarded for his efforts to reach this far.
Year 5 of the 5th Age:
This is it. The area below is weaker than the bedrock I have been forging through, and my magic carves through it like saw through flesh. This must be fate's reward for seeking the interplanar portal below, the portal that separates me from my Masters realm of banishment. To think He could have been banished and contained! Vile trickery...
I, Bilrach, will find this Rift, where the barrier between realms thins.
I, Bilrach, will re-open it and release my Master upon this world once more.I, Bilrach, will release Zamorak!