The 4 Rivers of Filth in Carcerem

AKA-
 * The 4 Rivers of Hades
 * Rivers of Hell
 * Cacerem's Entryways
 * Carcerem's Equators
 * Caligo's Trap

There are three subdivisions of Carcerem namely, Letum, Gelum, & Nequam, and each of these subdivisions have Entryways at each border. These Entryways are named "The 4 Rivers of Filth":
 * 1) The River Lethe, of Forgetfulness
 * 2) The River Cocytus, of Ice
 * 3) The River Pyphlegethon, of Fire
 * 4) The River Styx, of Hate

Lethe is the main Entryway into Carcerem, and into the first subdivision of Letum. Its waters are of a whispy mist that make one forget all goodness and sparks confusion in Goners and Wanderers. Cocytus is the Entryway into the second subdivision of Gelum. Its waters are of a black colored ice that forms agonizing regret into the hearts of Soes and Poes. Pyphlegethon is the Entryway into the third subdivision of Nequam. Its waters are of lava and sulfuric air that cause bloodlust into Demons and Waverers. And Styx is the end border of Nequam but those that drink from here will be reserved for Tenebris Hiems.