Vitriol Cesspool

The Vitriol Cesspool is a located on the southwestern part of the northern half of Noctilum, north of FN Site 209. The cave entrance is marked by poisonous water flowing outside. This liquid as well as the liquid inside the cave is harmful to the touch unless equipped with Terrain Damage Reducer augments.

Many purgovents float above the poisonous liquid. It can be difficult to fight them from the ground, so using commands for teammates to assemble on the islands can help when it comes to facing them. Additionally, it's often recommended to stay away from large lumps on the ground since hostile Ghillie Falsaxum hide in the area past the pool.

A hidden passage in the southern section of the cave through the harmful water contains a secret area where the plants all glow pink. This area contains a hidden Tyrant named Muruse, the Opulent, and a further area contains an even more dangerous Tyrant named Lugalbanda, the Wanderer-King after is completed.

Enemies

 * Ghillie Falsaxum
 * Logi Blatta
 * Magus Blatta
 * Stray Ovis
 * Tidal Purgovent

Tyrants

 * Froste, the Courteous
 * Lugalbanda, the Wanderer-King (after completing )
 * Summons Stray Ovis enemies.
 * Muruse, the Opulent

Trivia

 * In old English, the caustic chemical known as sulfuric/sulphuric acid was known as "oil of vitriol".