| Category | Rifts |
| Region | Hells Womb |
| Creator | Tome |
| Opened | 26 Temporal 1312 |
| Closed | - |
The Prisms of Worlds are large hollow, crystalline structures. They are shaped like octagons with each side fashioned of a different colored glass. Inside each is a octagon shaped chunk of the Ebon Bedrock. When they activate, at random day and time each year, things near are taken to a different time-line.
Tome, a Syndic of the Council of Nine, created these magical devices as a means to reach distant worlds. One of Tome's assistants was secretly a follower of Chronos. One of Tome's journals says that Chronos got personally involved in his business, interfering with the help of his best assistant. The end result he admits, was much better than a simple teleportation device for reaching another world.
The Prisms of Worlds are time rifts between Bal-Kriav and the world of Oerth. One Prism, the Prism of Paradomea, is in Paradomea City. Anyone within a marked out area, and when the Prism randomly shifts, is taken to Oerth, a world of another time-line. Once on Oerth, travelers can only return by using another Prism inside the grounds of Black Forge Keep.
The Prisms of Worlds have a very dangerous side effect. Travellers that tarry for more than a cycle on the other side, will think of the world they are on as their home world, and not want to go back.
Fellow Syndics, a group of adventurers has come through the Great Prism of Black Forge. They call themselves the League of Ten. They were shocked by the decadence of our great city. It seems that the world they came from is much more peaceful, less developed, ripe for exploitation.
- Mefnimius, Information Officer to the Council of Nine, on the arrival of the League of Ten from Oerth - "Reports to the Dark Merchants"