Inspecting the pedestals it becomes very obvious quickly, that they have a symbol embossed on the side facing the portal, carved from stone, you can see the very simple symbols for the following made out of the draconian common alphabet, a bastardized version of draconic made for simple minded monsters.
- Angels
- Demons
- Archons
- Devils
- Dragons
- Giant
- Undersea
- Underdark
- Far realm
- Undead
- Nature
- Magical beasts
- Fire
- Water
- Earth
- Air
- Constructs
The last pedestal is missing a symbol, and has a small clear gemstone that reflects the image of whoever peers into it.