There’s a long-standing exploit in Diablo 4 Season 10 that lets you farm infinite rewards from the Kurast Undercity tribute system — and surprisingly, Blizzard still hasn’t fixed it after three seasons. This method lets you endlessly loot Runes, Ancestral Legendaries, Mythic Uniques, or Obducite, depending on which tribute you use. Here’s how to farm Kurast Undercity rewards and how to set it up safely in Diablo 4 Season 10.

How to Farm Kurast Undercity Rewards in Diablo 4 Season 10?

1. Choose the Right Tribute

Each tribute determines what type of infinite reward you’ll receive:

• Tribute of Harmony → Infinite Runes

• Tribute of Radiance → Infinite Ancestral Legendaries

• Tribute of Ascendance → Infinite Mythic Uniques

• Tribute of Refinement (Obducite Tribute) → Infinite Obducite

These tributes can only be used if you own the Vessel of Hatred expansion (Season 10 content).

2. Prepare to Die — Literally

This farm relies on a death-trigger glitch. To make it work, your character must die a few seconds before the boss does. To make this easier, remove or unequip defensive gear and resistances. Respec out of heavy defensive Paragon nodes. Unequip some seasonal powers or skill points. The goal is to make yourself weak enough to die quickly to the Undercity boss’s AoE.

3. Start the Tribute Run

Plug your chosen tribute into the Kurast Undercity Brazier. Enter the Undercity instance and look at the district name on the top-right corner of the screen. You only want the Cave District — it’s the only one that works for this infinite farm. If you roll Ziggurat or Temple District, leave or reset until you get Cave.

4. Clear and Reach the Boss Room

Run through the Cave District normally:

• Fill the progress bar by killing enemies.

• Meet the time check.

• Get to the final boss room.

Once there, you’ll see the boss with a swirling AoE that deals consistent damage — this is key to the setup.

5. Trigger the Infinite Boss Loop

The trick is all about timing your death:

• Let the boss’s AoE bring you to low HP.

• Attack the boss until it’s about to die.

• Die a few seconds before the boss finishes dying.

If you time it right:

• The boss dies and drops Diablo 4 items.

• You die as well, so when you respawn, the boss respawns too.

• The loot from the last kill remains on the ground.

You can now repeat infinitely — killing and dying in a loop for unlimited drops.

6. Deal With Durability & Repair

Because you die constantly during this farm, your gear durability will break fast. You can’t teleport out or the instance resets, so instead buy the infinite repair item from a Dark Citadel vendor (a special tool added this season). This allows you to repair gear indefinitely inside the Kurast Undercity and stay there forever.

7. Best Builds for the Farm

You want a build that deals passive or pet-based damage, so you can focus on health timing rather than aiming attacks.
Good examples:

• Hydra Sorcerer – Hydras do the damage while you manage health.

• DoT Necromancer or Minion Druid also work.

Avoid direct-attack builds since they make death-timing harder.