Diablo 4 Season 10 Boss Loot Table (Mythic & Chaos Unique Drop Rate)

Season 10 of Diablo 4 arrives on September 23, 2025, bringing sweeping updates to boss encounters and item drops. This guide provides details on the latest Diablo 4 Season 10 boss loot tables, highlights new Mythic and Chaos Uniques, and explains the adjustments in drop rates for powerful gear. If you’re aiming to target farm new top-tier items or want to plan your farm routes for the best rewards, this guide will give you the information you need. So let's update the Diablo 4 Season 10 Boss Loot Table to sort out the drops from Bartuc, the Lord of Chaos, Lair Bosses, Infernal Hordes, and World Bosses!

Changes to Diablo 4 Season 10 Bosses & Boss Drops

Season 10's boss loot overhaul is designed to make your endgame journey both more rewarding and more engaging. You can now better target-farm the Uniques you want by selecting the right boss, although expanded loot tables mean you’ll need a bit more luck. Increased drop rates mean less time spent grinding for those elusive Mythics and Chaos Uniques. The new shield mechanic rewards burst damage and smart play, rather than punishing you with arbitrary invulnerability.

Major Changes to Boss Mechanics

Invulnerability Phases Reworked: Lair Bosses no longer become fully invulnerable at health thresholds. Instead, at 2/3 and 1/3 HP, they now gain a shield equivalent to a chunk of their max HP (1/3 and 2/3 respectively).

• If you break the shield quickly (within 5 seconds), you skip the old invulnerability phase, making high DPS builds more rewarding and boss fights less frustrating.
  

• 10-Second Rule: Invulnerability mechanics can’t trigger in the first 10 seconds of a fight, ensuring a smoother start.
  

• Bartuc, Lord of Chaos (Infernal Hordes’ new boss) follows these same rules, making all endgame boss fights more dynamic.

Loot Table Overhaul & Drop Rate Buffs

Unique Boss Loot Tables: All Greater Lair Bosses (Duriel, Andariel, Harbinger of Hatred) now have distinct, partially overlapping loot pools. Target-farming specific Uniques is now possible by focusing on the right boss, though broader pools mean more items to sift through.

Increased Unique Drop Rates: Mythic and Unique items now drop more frequently across all bosses, making high-end loot more accessible.

Lesser Lair Bosses & Infernal Hordes: Loot pools for Lesser Bosses have also been tweaked. Uniques and Legendary Aspects that were once exclusive to Infernal Hordes are now available from Lair Bosses.

Specific Additions & Removals: Each boss has had Uniques added and removed (e.g., “Kilt of Blackwing” added to Beast in the Ice; “Bane of Ahjad-Den” removed from several pools). New Season 10 Uniques are now farmable from specific bosses (see below).

Bartuc, Lord of Chaos: Defeating Bartuc (especially on Torment 1+) offers a higher chance for Chaos Armor and unlocks Unique Chaos Perks.

Types of Bosses in Diablo 4 Season 10

Diablo 4 Season 10 Bartuc Loot Table

Bartuc, Lord of Chaos, is the new Internal Hordes boss introduced in Season 10, this infamous Warlord of Blood from Diablo 2 returns, bringing with him a maelstrom of chaotic forces designed to challenge even the most seasoned adventurers. As the purveyor of chaos, Bartuc can summon Chaos Portals to warp the battlefield, drastically changing the fight and keeping players on their toes. Encounter him at the end of the revamped Infernal Hordes, where you'll have the choice to face him or the Fell Council. Prepare to confront a true test of skill and DPS, as Bartuc's multi-phase fight features invulnerability phases, tricky portal mechanics, and devastating AoE attacks. Defeating him, especially on Torment difficulty, yields significant rewards, including a guaranteed drop of Chaos Armor and the unlocking of Unique Chaos Perks!

Bartuc Boss Summon Requirements & Mats

• World Tier Required: Torment 1 or Higher

• Boss Level: Scales with World Tier
  

• Element Type: Fire, Lightning, Shadow

• Summoning Location: Infernal Hordes

• Summon Mat Required - Infernal Hordes Compass ( from Seasonal Reputation track, or as a drop from Helltide Chests, World bosses, Whisper Caches, or Astaroth's Rare Keys reward affix.)

• Mechanics: Seek Embers (Phase 1), Arcing Walls (Phase 1), Chaotic Barrage (Phase 1), Intermission

Diablo 4 Season 10 Lair Boss Loot Table

The entry point of the Boss Ladder system, Initiate Lair Bosses are accessible without cost and are designed for frequent encounters to farm Boss Lair Keys. These keys are required to unlock loot chests (Hoard) for Greater Lair Bosses. Occasionally, defeating one of these bosses can trigger a Belial Ambush.

1. Urivar Drops (Mats, Cosmetic, Uniques & Drop Rate)

Urivar Boss Summon Requirements & Mats

• World Tier Required: Torment 1-4

• Boss Level: Scales with World Tier
  

• Element Type: Fire

• Summoning Location: Fields of Judgement in Nahantu, west of Kichuk

• Summon Mat Required - Boss Lair Key: 12x Judicator's Mask (from Kurast Undercity)

• Mechanics: Rain of Justice (spear AoE), Summons Knights Penitent (adds with Elite affixes), Fire-based ground effects and traps
  

2. Grigoire, The Galvanic Saint Drops (Mats, Uniques & Drop Rate)

Grigoire, the Galvanic Saint Boss Summon Requirements & Mats

• Word Tier Torment: 1-4

• Boss Level: 60/75

• Activity Required: Complete Helltide

• Element Type: Lightning

• Summoning Location: Hall of the Penitent in Dry Steppes, south of Ked Bardu

• Summon Mat Required - Boss Lair Key: 12x Living Steel (found in Tortured Gifts from Helltides)

3. The Beast in the Ice Drops (Mats, Cosmetics, Uniques & Drop Rate)

Beast In the Ice Boss Summon Requirements & Mats

• World Tier Torment 1-4

• Boss Level: 85

• Activity Required: Complete Tier 30+ Nightmare Dungeons

• Element Type: Cold

• Summoning Location: Glacial Fissures in Fractured Peaks, south of Kyovashad

• Summon Mat Required - Boss Lair Key: 12 Distilled Fear (from Nightmare Dungeons)

4. Echo of Varshan Drops (Mats, Cosmetics, Uniques & Drop Rate)

Echo of Varshan Boss Summon Requirements & Mats

• World Tier Torment 1-4

• Boss Level: 55/75

• Activity Required: Complete Tree of Whispers, World Bosses, the Undercity, or slaying Elite Monsters on Torment Difficulties

• Element Type: Physical and Shadow

• Summoning Location: Malignant Burrow, west of the Tree of Whispers, Hawezar

• Summon Mat Required - Boss Lair Key: 12x Malignant Hearts (from Tree of Wishpers)

5. Lord Zir Drops (Uniques & Drop Rate)

Lord Zir Boss Summon Requirements & Mats

• World Tier Torment 1-4
  

• Boss Level: 80

• Activity Required: Complete Legion Events or collect components by killing World Bosses in World Tier 4

• Element Type: Fire

• Summoning Location: Ancient's Seat in the Darkened Way

• Summon Mat Required - Boss Lair Key: 12x Exquisite Blood (from Blood Maiden in Helltide)

6. Duriel, King of Maggots Drops (Uniques & Drop Rate)

Uber Duriel Boss Summon Requirements & Mats

• World Tier Torment 1-4
  

• Boss Level: 100

• Activity Required: Collect components by killing Echos of Varshan and Grigoire, the Galvanic Saint in Tier 4

• Element Type: Poision

• Summoning Location: Gaping Crevasse in Kehjistan, east of Gea Kul

• Summon Mat Required - Boss Lair Key: 3x Shards of Agony (from Grigoire & Varshan)

  
  

7. Harbinger of Hatred Drops (Uniques & Drop Rate)

Harbinger of Hatred Boss Summon Requirements & Mats

• World Tier Torment 1-4

• Boss Level: 100

• Activity Required: Kill the Beast in the Ice and Lord Zir in Tier 4 to collect components 

• Element Type: Shadow

• Summoning Location: Harbinger's Den in Nahantu, south of Kurast Docks

• Summon Mat Required - Boss Lair Key: 3x Abhorrent Heart (from Urivar in Fields of Judgement)

8. Echo of Andariel Drops (Uniques & Drop Rate)

Andariel Boss Summon Requirements & Mats

• World Tier Torment 1-4

• Boss Level: 100

• Activity Required: Kill the Beast in the Ice and Lord Zir in Tier 4 to collect components 

• Element Type: All

• Summoning Location: Hanged Man's Hall in Kehjistan, east of Tarsarak

• Summon Mat Required - Boss Lair Key: 3x Pincushioned Dolls (from The Beast in the Ice and Lord Zir)

Exalted Lair Boss Belial Drops & Loot Table

Belial is the apex of the Boss Ladder and the most challenging encounter in Season 8. He does not have a static loot table - instead, players choose which boss’s loot table they want to receive upon opening his Hoard. Defeating Belial guarantees an Ancestral Unique, and he has a high chance to drop Infernal Hordes Compasses.

Belial Boss Summon Requirements & Mats

• World Tier Torment 1-4

• Boss Level: 100

• Activity Required: Defeating the other Boss Lair encounters

• Element Type: Shadow and Poison

• Summoning Location: Palace of the Deceiver in Kehjistan

• Summon Mat Required - Boss Lair Key: 2x Betrayer's Husk (from Ambush Encounter)

Belial Ambush Encounter Loot Table

After defeating an Initiate or Greater Lair Boss and opening their Hoard, there's a chance for Belial to ambush the player in a surprise fight. This version drops the same loot as the boss just defeated, plus a Betrayer’s Husk, which is required to access Belial’s Exalted Lair.

Infernal Hordes Loot Table (Unique Weapons & Aspect)

The Infernal Hordes is a wave-based survival mode where players face increasingly difficult waves of enemies to gather Burning Aether. This activity culminates in a battle with the Fell Council, offering a chance to earn powerful loot, including class-specific unique items, Mythic Uniques, and valuable crafting resources.

Requirements

• Difficulty: Torment 1 or higher

• Summoning Material: 1 Infernal Compass

• Recommended Activities for Farming Compasses: Nightmare Dungeons, Helltides, Whispers of the Dead

Burning Aether Rewards

After defeating the Infernal Hordes and the Fell Council, players can spend Burning Aether on one of the following chests:

1. Spoils of Greater Equipment

   Cost: 200 Aether

   Rewards: Ancestral Legendary or Unique items with greater affixes.

2. Spoils of Materials

   Cost: 20 Aether

   Rewards: Crafting materials, including Masterworking resources.

3. Spoils of Gold

   Cost: All remaining Aether

   Rewards: Converts Aether into Gold.

World Bosses Loot Table (Drops)

World Bosses are large-scale public encounters that appear in specific regions at set intervals. They are extremely durable due to the Resilience mechanic and require coordinated group efforts to defeat. While not part of the Boss Ladder, World Bosses are vital for farming certain materials like Exquisite Blood.

• Spawns:

  Crucible (Fractured Peaks)

Saraan Caldera (Dry Steppes)

Seared Basin (Kehjistan)

Fields of Desecration (Hawezar)

The Cauldron (Nahantu)

• Examples:

  Ashava, Avarice, Wandering Death

• Loot:

  Spoils Caches

Scattered Prisms

Boss Summoning Materials

Pinnacle Boss - Echo of Lilith Loot Table

The Pinnacle Boss represents the ultimate challenge in Diablo 4’s endgame. Meant as aspirational content, the Echo of Lilith fight is a true test of build strength and player execution. It rewards cosmetic titles and the Resplendent Spark, used in high-tier item crafting.

• Location: Church Ruins (Nevesk)

• Drops:

  Resplendent Spark (first kill)

  Unique Mount & Title