In Diablo 4, players need to tackle specific Capstone Dungeons for meaningful progression, and the Enclave of Darkness is one that’s often hard to find. The Enclave of Darkness is classified as a Capstone Dungeon. This type of content is known for its high difficulty and is necessary for unlocking the next World Tier. These Capstone Dungeons have a fixed difficulty level, regardless of your current World Tier. After clearing the Enclave of Darkness and getting settled into World Tier 3 or 4, the next key endgame system is the Pit of the Artificers.