Posted byon February 8, 2018.
Last updated byon August 9, 2020.
Go to Priest Island, the large island in the northwestern corner of Kingsmouth Town.
Look for anything particularly out of the ordinary on the island. Filth Wells pouring out of the ground can be found littering the island.
Pick up 12 boulders from around Priest Island. They're everywhere in piles of 1, 2, or 3 loose boulders.
Cover all four Dark Wells on Priest Island.
The first Dark Well can be found in the northeastern heart of Priest Island, landlocked (230,980).
The second Dark Well can be found on the southeastern edge of Priest Island (180,925).
The third Dark Well can be found on the northwestern shore of Priest Island facing the ocean (60,960).
The fourth Dark Well can be found on the southwestern shore of Priest Island (50,895).
Head farther into the heart of Priest Island, where an enormous Well and Colossal Hulk await (175,960).
Kill the lumbering beast of Filth.
Climb up the rocks near the shore (145,980) where a huge loose boulder sits. Push it down.