Shrine of Salvation Dimension

"You remember the air raids? When that came when we needed to hide our Toa team, and so we hid them in the Shrine's dimension."

- Turaga Maroona, The Feral Plains: Volume II

The Shrine of Salvation Dimension was a pocket dimension accessed by using the Shrine of Salvation.

History
It is likely that the Shrine of Salvation was created after the dimension came into existence. However, as soon as the machine was used to access the dimension, the machine and the dimension seemed to become paired together, the state of the machine affecting the state of the dimension.

As Turaga Maroona explained, the dimension was initially used for transportation, being able to reach other points in the Matoran Universe. After this use was forgotten, it was simply used for storage.

At some point, the Brotherhood of Makuta sent an air raid over the island of Powai Nui where the Shrine was located. The dimension was used to store the Toa Powai, so that they were not found by the Makuta. The fear and panic caused by the raids caused the Shrine to be abandoned for some time, and the six Toa inside the pocket dimension went into a stasis-like state.

After some time, Maroona activated the Shrine and pulled Toa Navahko out of the dimension. She later pulled Toa Corduk out.

Makuta Hysterix, trapped as a spirit, found the machine and began to tamper with it. This caused Corduk to spontaneously teleport from Powai Nui to the pocket dimension. At this point, the dimension became a pile of broken rock, caused by the malfunctioning state of the Shrine. After a conflict involving Toa Wreshi's possessed body, the machine went back to normal and Wreshi was pulled out of the dimension.

Later, Toa Salvina, Toa Detras and Toa Lewok would be awakened and pulled from the dimension.

Description
While Turaga Maroona describes the dimension as being the size of a room, this is only under normal circumstances, as it is shown to vary in size depending on the state of the Shrine of Salvation.

When the Shrine was tampered with by Makuta Hysterix, the dimension became expansive and was filled with large, broken stones.

Because of the design of the Shrine, only six beings can be inside of the dimension at one time.