Magic portal

A portal is a type of trap that takes you to a different section of the dungeon. Portals can be found:

• In a vault between Dungeon level 11 and Medusa, leading to Fort Ludios
• In the entrance to the Wizard's Tower in Gehennom.
• In a normal dungeon room, leading to the Quest
• Somewhere on each of the Elemental planes, save Astral, leading to the next.

Single-use portals are also technically generated when the Eye of the Aethiopica is used to gate between dungeon branches, although you never get to see them.