The suspected holding state for hired and dungeon-born mercenaries between crawls, one of two possible fates when they vanish.
As Zerzura approached, Carl laid out the possibilities for the hired mercenaries — Sledge, the surviving Cretins, and the for-hire dungeon-born mercenaries fielded by every team. They would simply disappear.
Where they went was uncertain: possibly moved into 'storage' for the next crawl, possibly tossed back into the Mercenary Markets. Either way, none of them would move to The Twelfth Floor with the city.
The dungeon's suspected off-season warehouse for reusable NPC mercenaries.