Partway up one of the peaks of the Splinter Mountains the side of the mountain has been split; a fissure leads down to the heart of the earth, and around it is a relatively flat area. It is the place where the Sluagh swore their Oath of Guardianship of the Dreaming.
An ancient Troll lives at this place and never leaves it. It is believed that a Dragon dwells within the fissure, and the steam which rises from the gap in the mountain is its breath. The stars are always visible from this place, even on a cloudy day.
It is to Moonbeam Fissure that the Sluagh took the souls of the dead, to be dealt with by the dragon, so that they should pass properly back into the realm behind the gates.