One room in Diablo 4's Dark Citadel never stop spawning elites, and it is worth up to 12 caches an hour
Bring three friends an a lot of AoE. Solo Self-Found players will have to farm somewhere else.
With 20 days left in Season 15, a new AFK farm has been discovered in the Dark Citadel. For players still chasing those perfect items or looking to try out a new build before we move into the next season, it is well worth a look. Unfortunately, because the farm is inside the Dark Citadel, it is not available to players on Solo Self Found realms.
This seasonal reputation farm rewards Mystery Greater Archetype Caches once players earn all other rewards. These caches can contain rare Runes, Soul Splinters, and Mythic unique items.
You Will Need at Least One Friend
The farm takes place in the Dark Citadel, so it requires at least two players. However, we recommend a full party of four, because enemies can become trapped outside the reach of most two-player parties.
If your party is not full, consider listing it so other players can join. To do this, open the Social menu and select "List a Party."
How to Reach the Farming Location
Fortunately, setting up this farm is fairly simple. If you have not unlocked the Dark Citadel yet, travel to it in Nahantu, northeast of the Kurast Bazaar, and complete the Stronghold there.
From there, follow these steps:
Take the westernmost door to reach the Enclave of Strife
Clear the first few zones. The dungeon will separate players for several segments along the way.
Keep going until the dungeon brings the players back together in the Passage of Enlightenment.
Find the gateway at the center of the Passage of Enlightenment, and set up around it.
Time to farm! Make sure nobody stands on the gateway itself. If someone accidentally activates it, it will teleport players out of the passage.
The Best Builds for Endless Elites
Elites spawn across the whole arena, so builds with large area-of-effect skills perform best. Summoner builds and 
Whirlwind Barbarians are both strong choices. That said, other builds remain viable. Creator Cerviel ran the farm with a 
Zeal Paladin.
If your character is slowly dying over time, consider the 
Neo
Que runeword for automated Barrier. Additionally, running 
Stealth can be a tankier option compared to other chestplates. Check out our Life, Barrier, and Fortify guide below for more tips.
Diablo 4 Stats Guide: Life, Barrier, and FortifyUp to 12 Caches an Hour
Every elite kill grants seasonal reputation. With the right team, the farm can yield up to 12 Mystery Greater Archetype Caches per hour. The recommended approach is to have each player take a corner of the room and keep attacking.
With the season winding down, this farm offers a low-effort way to collect Runes, Soul Splinters, and Mythic unique items in a group. For Solo Self Found players, however, the hunt continues elsewhere.
To see the farm in action, including the full route through the Enclave of Strife, check out Cerviel's video below.