The Halved
"The attention of the Halved falls briefly on your vessel. Your crew wail as its eye fills your windows!
"The Halved! The sun turned to night!"

The Halved is a Judgement that presides over the region of Eleutheria, in the High Wilderness. It governs distance and measures, and has an array of servants, just like the Sun employed the Bazaar. In fact, the Halved murdered its own space-crab messenger, The House of Rods and Chains, for defying its command.

The Halved is a former binary star; its other half was betrayed and murdered during a revolution. This was incited by the current resident of the Well of Wonders, a Parabolan entity that claims to be a living story. At some point, it came around to the entity's viewpoint and started to actively radiate darkness instead of light, leading to Eleutheria's bizarre and Revolutionary-friendly nature.
It is heavily implied that the colossal Eye that lies beneath the Unterzee is the Halved; this curious entity sprouts extra eyes on the bodies of zee-captains as a form of "message" to the Neath.
The Halved appears to have ties to the Liberation of Night, possibly to seek revenge upon other Judgements.