The Veil

A large ring of meteors in the Incipisphere that forms the outer boundary of The Medium. Near the end of a Sburb game session, the Black Queen and King cause the Veil to fall towards Skaia in an attempt to destroy it, in a phase of the game called The Reckoning. At this point, the King and Queen must be slain before the meteors destroy Skaia. Skaia buys time by catching some of the meteors in portals, though it cannot fend them off for long.

Apparently the meteors contain buildings like labs, factories, and facilities for genetic engineering. The Veil is considered a neutral ground between the two kingdoms, and is where the Trolls are when they troll the protagonists.

It is heavily implied that The Veil in general, and The Reckoning in particular, are in some way connected to the meteoric apocalypse on Earth, which gallowsCalibrator has also referred to as a "Reckoning".