Disable the Drill Bit
Ascend the stairs from the Serpent Hole and loop around to the room with the Scarab. Grab the Lurcher Cache, and head down the stairs to the left first. Here, you can grab a Demonic Artifact and unlock a gate leading back to the Lowlands. Return the other way and descend the stairs on the northern side to head back outside.
Several enemies, including a Trauma, lurk outside the building with the Serpent Hole. Fortunately, so does a highly flammable oil slick. Activate the Flame Hollow, bait the enemies toward the oil slick, and unleash the Chimera’s Growl attack. Or, if you have a full Wrath Meter, draw them in tight and trigger the Immolation attack. Either of these will ignite the oil and inflict steady burn damage on your foes.
Crawl through the gap in the wall next to the stairs you descended to find a Demonic Artifact, then crawl back through. The Large Lurcher Cache in the far corner of this sandy area is worth 10,000 Souls, so don’t miss it.
Flame Jump up the cliffs to the east and catch a ride on one of the mining carts. Wait for one with its bucket open to move close to the edge, and then leap on. Feel free to slow it with Stasis form if worried about the timing. Get the items from the nearest platform and building ledge, reboard the cart, and ride it to the next platform on the left.
Ascend the Stasis shaft to reach the room above the massive drill at the Drilling Annex. Hit the lever with Salvation or a leaping swing of the Mallet of Scorn to raise the gears, disabling the drill below. Leap through the hole in the floor.
