The fifth layer of Carceri is a realm where each orb is coated in a cold, shallow ocean fed by constant black snow. The snow and water are mildly acidic.

Artificial structures do not last long in Porphatys. Small islands barely taller than sandbars rise above the waves. Most petitioners crow from atop the small sandbar islands, promising anything to those who can take them away. Despite their entreaties, they reward any charity with betrayal at the first opportunity.