Orbs

In the TV series, parallax, an orb is smooth white sphere. A single orb resides in each world of the parallax, and when touched by a full blood guardian, the guardian can be transported to the reading room, the orbs acts somewhat like a key to accessing the reading room. Another function of an Orb is that when in possessed by a guardian the orb has the ability to mask the smell of a guardian's blood. Enabling the guardian to be undetected by welkin and krellicks.

It should also be noted that when an orb is not in its original world, and is touched by a guardian, the events that had happened in the orb's original world will play like a movie for the guardian.