The Hidden Passage is a long path and tunnel that leads from the Shadow Throne to a platform outside the Halls of Reflection. In order to escape the Lich King, the player must battle through waves of enemies raised by the Lich King in order to break through the ice walls he creates to halt the party's progress. Upon reaching the end of the passage, the players will be rescued by their faction's gunship (the Skybreaker for Alliance, Orgrim's Hammer for Horde) that will blast the exit to the outside balcony thus ending the encounter.

In the center of the cavern where the Passage begins, a large saronite necropolis, greatly resembling Malykriss, can be seen (but not reached).