Diablo 4 Season 11 Full Guide to New Dungeon, Boss, Loot, and Best Farming Strategies

The Diablo 4 Season 11 Kurast Undercity Update delivers one of Diablo 4 Items the most impactful mid-season expansions Blizzard has released so far. With a brand-new dungeon zone, repeatable seasonal activities, powerful bosses, and an entirely new loot and reputation system, Kurast Undercity reshapes both leveling and endgame progression for Season 11.

Whether you're a returning player or a veteran grinder pushing World Tier 4, this update introduces meaningful progression paths, high-density combat, and some of the strongest seasonal power spikes available.

Below is a complete breakdown of everything added in the Season 11 Kurast Undercity Update-and how to maximize its rewards.

What Is Kurast Undercity in Diablo 4 Season 11?

Kurast Undercity is a massive, multi-layered dungeon located beneath the jungles of Kehjistan. Designed as an endlessly repeatable activity, it blends the enemy density of Nightmare Dungeons with event-driven mechanics similar to Helltides.

Unlike traditional dungeons, Kurast Undercity focuses on constant combat, layered objectives, and scaling difficulty that rewards aggressive playstyles and efficient clearing.

Access Requirement:

Players can unlock Kurast Undercity after completing a short introductory quest available at Level 35, making it accessible well before the endgame.

New Seasonal Activity: Necrotic Breaches

The centerpiece of the Undercity experience is Necrotic Breaches, dynamic events that spawn throughout the dungeon.

Each Breach unleashes waves of elite enemies, including Broodsworn, Toxic Witches, and resurrected Kurast guardians. Clearing a breach rewards:

Necrotic Resin, a new crafting material
Brood-Infused gear with poison and necrotic-based affixes
Undercity Reputation, used to unlock powerful vendor rewards

At higher World Tiers, Breaches gain modifiers similar to Nightmare Sigils-such as empowered elites, spreading poison pools, and forced enemy enrages. These modifiers dramatically increase XP gains and buy Diablo 4 gold improve the quality of dropped Diablo 4 Items.