Toxic Sewer Map (Atlas of Worlds)

Sewer is an indoor map that uses the Sewers tileset. Its layout is a twisting maze of tunnels and small rooms, similar to the sewer zones in Act 3.

Boss Arena
Boss doesn't have an arena. However, it's location is a very distinct part of the sewer.

Boss
Arachnoxia - unique spider.
 * Casts chaos spear
 * Uses leap slam
 * Spawns hatchlings and releases a caustic cloud around them

Boss video
Карта клоаки (Атлас миров)