"Beyond the Seal.
If a character moves the false seal, he reveals a portal to nothing. Prior to the creation of the Axis Seal, the portal led to the plane of Apet, however now that the Axis Seal has closed off the planes, the portal leads to a void between the planes. There is no light, no matter, and no gravity in the void, though it has invisible edges and only is about 100 feet across.
A human body floats in the void. Its face was torn off by some Gidim beast, but it has not rotted at all. "
It probably alludes to the fact that whatever was in the void 'airlock' has not been affected by the stasis/time it has languished in there, and hence to Xambria... the human probably toppled that way after being glomped... (see page 2 : the summary on Pocket Dimensions.)
Probably if anyone asks how Sijhen and the warbeasts survived in the airlock so long, it's pretty much flavour with a hint