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How a Kurast Undercity run works
The activity is a sequence of dungeon stages under a rapidly depleting timer. Fight through each area, build Attunement, and reach the final boss before time runs out. Blizzard’s Undercity overview describes the core loop and its timer, Attunement, and Afflicted demons.
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Manage the timer
Defeating Afflicted demons extends the timer, giving your group more time to reach the boss. Prioritize those enemies when you encounter them rather than treating every fight as a race past all optional targets.
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Killing monsters and completing events grants Attunement. The amount you earn affects the quality of loot after the boss, so use the time available to build it while continuing toward the end of the run.
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What Tributes do
Tributes are keys earned throughout Sanctuary and inside the Undercity. Using one augments a future Undercity run to target a particular kind of reward. Blizzard says higher-quality Tributes offer greater spoils but make the next run considerably more challenging; the official feature overview explains that trade-off.
Choose a stronger Tribute when you are prepared to take on the added difficulty. The available official information here does not establish exact payouts for every Tribute, so treat the reward target as a way to shape a run—not as a guarantee of a particular item.
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- LORD OF HATRED EXPANSION — Includes Diablo IV: Vessel of Hatred Standard Edition and Diablo IV: Lord of Hatred. The Diablo IV base game is required to play.
- IN-GAME EXTRAS — Get 1 Extra Stash Tab, 2 Additional Character Slots, and 3 Decor Items in World of Warcraft.
- NEW CLASSES AND REGION — Master two new classes and explore the ancient region of Skovos in the Lord of Hatred expansion.
- ACTION RPG ADVENTURE — Slay demons, master abilities, explore nightmarish dungeons, and find legendary loot in a dark open world.
- NEW CAMPAIGN AGAINST MEPHISTO — Make your stand against the Prime Evil Mephisto in a rich new story featuring new enemies, regions, and narrative twists.
Runes and other documented reward changes
Blizzard’s July 1, 2025 patch notes for version 2.3.0 documented several Undercity reward changes. These are dated patch-note details, not a complete current reward table.
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- Every Undercity run drops at least one Rune.
- The Runes Tribute rewards more Runes per Attunement, with rewards scaling by Torment Level.
- The Tribute of Titans’ drop rate was reduced from Lair Bosses and increased from randomized Tribute sources. In Torment Tiers, randomized Tribute drops had equal chances to be Tribute of Harmony or Tribute of Titans.
- Tribute of Harmony could infrequently drop from random Tribute sources, while its Nightmare Dungeon drop rate was slightly reduced.
These changes are recorded in Blizzard’s Diablo IV Patch Notes (2.3), under the July 1, 2025 build 2.3.0 notes. Blizzard’s latest listed patch-notes entry is build 3.2.2, dated September 30, 2026; it does not announce an Undercity mechanic change. That establishes the published version context, but is not confirmation that every historic detail has remained unchanged. See the current patch-notes page for the listed build.
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- Only one code per customer
- Diablo IV is the next-gen action RPG experience with endless evil to slaughter, countless abilities to master, nightmarish Dungeons, and legendary loot.
- Embark on the campaign solo or with friends, meeting memorable characters through beautifully dark settings and a gripping story, or explore an expansive end game and shared world where players can meet in towns to trade, team up to battle World Bosses, or descend into PVP zones to test their skills against other players - no lobbies necessary - with cross-play and cross-progression on all available platforms.
Access and expansion requirement
Kurast Undercity is part of the Vessel of Hatred expansion. Blizzard’s launch overview lists Xbox, PlayStation, Battle.net, and Steam as platforms for the expansion. Because that is launch-era information, confirm current platform and edition availability with the relevant store before buying. The official information cited here does not establish a complete current unlock walkthrough.
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Rank #4
- Diablo IV is the next-gen action RPG experience with endless evil to slaughter, countless abilities to master, nightmarish Dungeons, and legendary loot
- Embark on the campaign solo or with friends, meeting memorable characters through beautifully dark settings and a gripping story
- Explore an expansive end game and shared world where players can meet in towns to trade, team up to battle World Bosses, or descend into PVP zones to test their skills against other players
- No lobbies necessary - with cross-play and cross-progression on all available platforms
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