After running through Phantom-on-the-Water the River Eidolon ends at a series of steep cliffs known as Blacksmith’s Bluffs. Where the course of the river stays truest it has managed to wear these cliffs down into a sandy beach the Ghosts use as a harbour for shipping. But the river splits off into a delta of many little streams and tributaries, most of which aren’t strong enough to erode the cliffs down and instead wind up spilling over the edge as a number of waterfalls. And the largest and most powerful of these falls has wound up carving away at the base of the cliffs, where the hammering of waves already weakened it. The combined might of all that water has opened up a fairly sizeable cave that, due to the turbulent curtain of spray that conceals it, has become referred to by the Ghosts as the Cauldron. They use it for smuggling as, so far at least, the Brotherhood is unaware of its presence. The Rahkshi students, on the other hand, know full well it exists and have adopted it for a similar purpose; smuggling and storing items otherwise considered contraband, be they specialised weaponry or just food nicer than the slop served in the Refectory.