Hive Cluster

Spawns

 * Spitter
 * Gup
 * Parent
 * Evolved Lemurian
 * Archaic Wisp

Bosses

 * Toxic Beast
 * Imp Overlord
 * Scavenger

Artifact
The artifact gate can be found in the upper-rightmost corner of the map. Hanging from the ceiling is a series of invisible, climbable vines that periodically glow a bright pink. Jumping across is sufficient to unlock the Command artifact.

Bloated Survivor
The Bloated Survivor can be found in the bottom-right corner of the map. Inspecting the corpse unlocks Dead Man's Foot item and the achievement of the same name. This also spawns 1-2 Archer Bugs upon inspection.

Interacting with the Bloated Survivor will not drop the item, it just unlocks it.

Hive Cluster