With assistance from the whilgs, we went into Dreamspace to fight what was left of the balor you'd fought once upon a time. This mission was sponsored by the Alliance for Law, but it also benefited several chaotic factions, since the balor had invaded Limbo and was using energy from there to regenerate itself. While we were in Dreamspace, we encountered a figure that was invisible, desolid, and apparently incapable of communicating or affecting its surroundings; the desolidification was stronger than the best suppression we could muster. The figure followed me around as closely as possible for a while, but we eventually needed to move faster than it could and left it behind. We eventually killed the balor, but we never saw the figure again.