Stairway

The Stairways are similar to Portals, except they extend up and down dimentions as opposed to across the Triad and halfsteps.

The Triad each had a Stairway in the beginning: On Earth it was in the Garden of Eden; on Cannoraoul it was on top of the highest mountain; and on Valearia it was and is on the Western Isles. This one still exists because the Halfbloods and Half-Titans are there to guard it.

In the lowest heaven, refered to as the Gate, there is a Stairway. It extends up to the Lower Heaven. It is locked behind a massive gate (hance the dimention's name) and it guarded by Titans.

There are no other Stairways known. Spiritual beings - such as (Elder) Angels or Demons, Spirits of Destruction, or Vera - can cross dimentions without Stairways, but these are necessary for physical beings, Titans, and the Governors.