Magma Barracks

Spawns
Evolved Lemurian

Wisp

Bighorn Bison

Mechanical Spider

Bosses
The Direseeker

Cremator

Toxic Beast

Scavenger

Artifact
The artifact gate appears at the far left, on the middle level. The artifact is triggered by activating the three switches located in the level (depicted on the right). The switches are activated by shooting them, but as they are behind walls it's necessary to use an attack that can reach through the wall. Confirmed way to press switches : Bandit's Dynamite, Huntress's Cluster Bomb, Enforcer's Shotgun, HAN-D's FORCED_REASSEMBLY.

Two of the switches are located in the open at upper left and center of the level, while the third is hidden partway down the lefmost narrow shaft.