The Infinite Staircase, sometimes knownas the Celestial Staircase or the Celestial Stairway, was a network of pathways linking the Realms with the planes.

• The Infinite Staircase has doors that lead to many different planes.
• The Staircase joins with any area on a plane where intelligent creatures have expressed some sort of creative spirit.  
• Stairs that lead to evil planes are cold and shadowy. Stairs that lead to Upper Planes are clean, bright and warm.  
• Gravity changes from landing to landing. 
• Each landing has a door. The keys to the doors are always mysteries, riddles and puzzles. 
• Dark passages are said to lead to cities where all magic fails or where visitors age, wither and die.
• The Staircase is guarded by Lillend, snake-women who serve a moon goddess.
• Those who offend the moon-goddess are trapped here.  
• The Staircase is always under construction. The builders are always heard but never seen. 
• Strange creatures of elemental time supervise its operation. 
• A person can travel the staircase to get to the city of their heart’s desire, but only once. This usually only happens to lone travelers.
• There’s a guild of adventurers who live on the Staircase, known as The Planewalker’s Guild.