TL;DR
- Five main bosses plus seasonal event boss offer targeted unique item farming
- Each boss requires specific summoning materials from different game activities
- Echo of Duriel drops exclusive super uniques and requires materials from other bosses
- Class-specific loot tables allow focused gear acquisition for build optimization
- Advanced strategies include stagger mechanics and efficient material farming routes
Diablo 4’s second season introduces a structured endgame boss progression system that enables targeted farming of specific unique items. Understanding the summoning requirements and loot tables for each encounter is crucial for optimizing your character’s progression and acquiring build-defining gear pieces.

The boss progression follows a logical difficulty curve, starting with Echo of Varshan and culminating with the challenging Echo of Duriel. Each encounter requires specific materials gathered from different endgame activities, creating a diverse farming experience that encourages participation across multiple game systems.
Echo of Varshan
This grotesque entity resides within the Malignant Burrow dungeon located beneath the Tree of Whispers. To summon this boss, adventurers must gather anatomical components from Grotesque Debtors, with an optional Malignant Heart requirement for World Tier 4 encounters. The loot pool includes class-specific enhancements that significantly boost character capabilities.
Barbarian: Fields of Crimson, 100,000 Steps, Gohr’s Devastating Grips.
Druid: Mad Wolf’s Glee, Vasily’s Prayer, Greatstaff of the Crone.
Necromancer: Bloodless Scream, Deathless Visage, Deathspeaker’s Pendant.
Rogue: Condemnation, Eyes in the Dark, Skyhunter.
Sorcerer: Staff of Endless Rage, Esu’s Heirloom, Raiment of the Infinite.
Universal class items include Frostburn and Mother’s Embrace.
Pro Tip: Farm Grotesque Debtors during Whispers of the Dead completions for efficient material acquisition. The Malignant Heart, while optional, increases drop rates for higher World Tier encounters.
Grigoire, The Galvanic Saint
This formidable demonic entity wields an enormous mace and employs devastating lightning-based assaults. Summoning occurs in World Tier 3 or 4 by accumulating Living Steel from Helltide chests. This boss features a unique stagger mechanic where crowd control effects fill a vulnerability bar, creating damage windows for skilled players.
Barbarian: Ramaladni’s Magnum Opus, Rage of Harrogath, Battle Trance, The Butcher’s Cleaver.
Druid: Insatiable Fury, Hunter’s Zenith, Waxing Gibbous, The Butcher’s Cleaver.
Necromancer: Blood Artisan’s Cuirass, Howl from Below, Greaves of the Empty Tomb.
Rogue: Word of Hakan, Grasp of Shadow, Windforce.
Sorcerer: Staff of Lam Esen, Iceheart Brais, Gloves of the Illuminator.
Cross-class equipment drops include Penitent Greaves.
Advanced Strategy: Coordinate Helltide farming during active events to maximize Living Steel acquisition. Focus on crowd control abilities to exploit the stagger mechanic for extended damage phases.
The Beast in the Ice
This colossal frozen monstrosity inhabits the Glacial Fissure nightmare dungeon. Challengers must accumulate Distilled Fear from other nightmare dungeon completions to craft the specialized Glacial Fissure Nightmare Sigil required for access. The encounter rewards include both unique Diablo 4 items and substantial gold reserves.
Barbarian: Fields of Crimson, 100,000 Steps, Ancients’ Oath, Battle Trance, Hellhammer.
Druid: Insatiable Fury, Hunter’s Zenith, Waxing Gibbous, Storm’s Companion.
Necromancer: Bloodless Scream, Howl from Below, Deathspeaker’s Pendant, Ring of Mendeln.
Rogue: Condemnation, Word of Hakan, Windforce, Eaglehorn.
Sorcerer: Staff of Lam Esen, Esu’s Heirloom, Gloves of the Illuminator, The Oculus.
Universal equipment includes Frostburn, Mother’s Embrace, Fists of Fate, and Tassets of the Dawning Sky.
Efficiency Tip: Target nightmare dungeons with high Distilled Fear drop rates and complete them during seasonal bonuses for optimal material farming.
Dark Master
Known alternatively as Lord Zir, this powerful demonic entity employs fiery assaults and summons vampiric minions to overwhelm challengers. Access requires Exquisite Blood gathered from World Boss encounters or Legion Events exclusively in World Tier 4. The boss incorporates a stagger system vulnerable to crowd control effects.
Barbarian: Ramaladni’s Magnum Opus, Rage of Harrogath, Gohr’s Devastating Grips, Overkill, The Butcher’s Cleaver.
Druid: Mad Wolf’s Glee, Vasily’s Prayer, Greatstaff of the Crone, Fleshrender, The Butcher’s Cleaver.
Necromancer: Blood Artisan’s Cuirass, Deathless Visage, Greaves of the Empty Tomb, Lidless Wall.
Rogue: Grasp of Shadow, Eyes in the Dark, Skyhunter, Asheara’s Khanjar.
Sorcerer: Staff of Endless Rage, Iceheart Brais, Raiment of the Infinite, Esadora’s Overflowing Cameo.
Cross-class gear includes Penitent Greaves, Razorplate, and Temerity.
Combat Strategy: Prioritize clearing vampiric minions during phase transitions to reduce incoming damage and create cleaner damage windows against the primary target.
Echo of Duriel
This level 100 pinnacle encounter employs toxic and physical assault patterns. Summoning requires Shards of Agony from Grigoire, The Galvanic Saint, and Mucus-Slick Eggs from Echo of Varshan, both exclusively in World Tier 4. This boss represents the ultimate challenge in the current seasonal progression system.
Barbarian: Azurewrath, Tuskhelm of Joritz the Mighty.
Druid: Tempest Roar, Dolmen Stone.
Necromancer: Black River, Blood Moon Breeches.
Rogue: Cowl of the Nameless, Scoundrel’s Leathers.
Sorcerer: Flamescar, Blue Rose.
Universal equipment includes Godslayer Crown, Flickerstep, Tibault’s Will, X’Fal’s Corroded Signet, Soulbrand, and Banished Lord’s Talisman.
Exclusive super unique drops: Doombringer(Barbarian, Necromancer, Rogue), The Grandfather(Barbarian, Necromancer), Melted Heart of Selig, Andariel’s Visage, Harlequin Crest, Ring of Starless Skies; Ahavarion, Spear of Lycander(Druid, Sorcerer)
Pro Tip: Coordinate farming sessions for both Grigoire and Varshan to efficiently accumulate both summoning material types required for this encounter.
Red-Cloaked Horror
This demonic entity employs chilling and physical assault patterns and can be summoned by achieving Mastery completion in Blighted Revelry events within the Fractured Peaks region.
The Red-Cloaked Horror yields Red-Cloaked Trophies, which transform into Midwinter Proof currency used exclusively for acquiring limited-time winter-themed cosmetic items from the seasonal Midwinter Vendor.
Event Strategy: Focus on mastering Blighted Revelry mechanics during peak activity periods when player participation increases completion efficiency.
To maximize efficiency in your boss farming endeavors, consider implementing these advanced strategies:
Material Farming Routes: Plan Helltide and nightmare dungeon sessions around world events and seasonal bonuses. Group play significantly accelerates material acquisition through shared objectives and coordinated farming.
Class Prioritization: Focus on bosses that drop items essential for your current build progression. Echo of Varshan provides foundational gear, while Echo of Duriel offers endgame-defining super uniques.
Common Mistakes to Avoid: Don’t waste summoning materials on lower World Tiers when you can access higher difficulties. Always check your current gear against boss loot tables to avoid redundant farming.
Time Investment Estimates: Average material farming sessions require 1-2 hours per boss, with Echo of Duriel requiring coordinated farming of multiple bosses for summoning components.
For comprehensive guidance on character progression and build optimization, check out our BF6 Class Selection Guide to understand how different class mechanics interact with these unique items.
Action Checklist
- Complete Echo of Varshan summoning requirements by farming Grotesque Debtors
- Accumulate Living Steel from Helltides to challenge Grigoire
- Farm Distilled Fear from nightmare dungeons for Beast in the Ice access
- Gather Exquisite Blood from World Bosses for Dark Master encounters
- Coordinate farming of Grigoire and Varshan for Duriel summoning materials
- Master Blighted Revelry events for Red-Cloaked Horror seasonal rewards
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