Diablo 4 Pinnacle Boss Summoning Materials: A 2026 Farming Guide

In the ever-evolving world of Diablo 4, the pursuit of Mythic Uniques remains the driving force for many endgame players. As of 2026, the pinnacle boss system—first refined during the Season of the Infernal Hordes—continues to be the primary method for acquiring these coveted items. However, summoning these bosses requires a steady supply of specific materials, each tied to different endgame activities. This guide breaks down every summoning material, where to farm them efficiently, and which bosses they summon.

What Are Summoning Materials?

Summoning materials are the keys to battling pinnacle bosses. Each boss can only be summoned in a specific dungeon with the correct materials, most of which drop from mid to late-game content like Helltide and Nightmare Dungeons. Pinnacle bosses are the primary source of Mythic Uniques in Diablo 4, so virtually every player will want to farm these bosses at some point to get their hands on a Harlequin Crest or Tyrael's Might.

Every pinnacle boss can be summoned in one of two states: Normal and Tormented. Normal bosses drop one kill's worth of loot and have a 1.5% chance of dropping a Mythic Unique. Tormented variants drop five kills' worth of loot but only cost three times the materials, making it more cost-effective to farm Tormented bosses when you can. They also have five shots of dropping a Mythic Unique, giving you roughly a 7% chance of obtaining one.

Tormented vs. Normal Bosses

The decision to fight a Tormented boss over a Normal one is straightforward for most players. While the material cost is higher, the efficiency gain is substantial. Tormented bosses not only yield more loot per summon but also significantly boost your odds of landing a Mythic Unique. As a rule of thumb, always aim for Tormented variants once your build can handle the increased difficulty.

Summoning Materials At A Glance

Stygian Stones

Best Farm: Infernal Horde – Resource Chests (T6+)

Related Boss: All Tormented Bosses

The best source of Stygian Stones is the Infernal Hordes activity. They are an uncommon drop from the resource chest in Tiers 7 and 8. You can expect to earn roughly two Stygian Stones per run, potentially more if you're lucky or have a particularly good run. Stygian Stones are used to summon Tormented variants of all pinnacle bosses. You need one Stygian Stone per Tormented summon, regardless of the boss you're attempting to kill. So long as you open the resource chest on occasion in the Infernal Hordes, you should have more than enough Stygian Stones to farm Tormented bosses. Standard summoning materials will be your main bottleneck.

Exquisite Blood

Best Farm: Helltide – Hell Fiend Boss

Related Boss: Lord Zir (9 Normal, 27 Tormented)

The Blood Maiden in Helltide has a high chance of dropping at least one vial of Exquisite Blood. You can summon this boss by sacrificing three Baneful Hearts at the boss' summoning altar, which is usually marked on your map as a Whisper objective. They can also drop from World Events, although this isn't guaranteed like the Hell Fiend. You'll need 27 Exquisite Blood samples to summon Tormented Lord Zir, a fairly popular boss that drops the highly coveted Fractured Winterglass Unique for Sorcerer. You can find his summoning altar in The Darkened Way dungeon in Fractured Peaks.

Distilled Fear

Best Farm: Nightmare Dungeons (T21+)

Related Boss: Beast in the Ice (9 Normal, 27 Tormented)

Distilled Fear is arguably the easiest material to farm, as it's a guaranteed drop from T21+ Nightmare Dungeons. Simply clearing the dungeon will award Distilled Fear, usually one or two. This material also has a high drop rate from Treasure Goblins, although there aren't any consistent methods for farming Treasure Goblins specifically. Beast in the Ice requires 27 Distilled Fear to summon as a Tormented variant. You can summon this boss from the Glacial Fissure dungeon in Fractured Peaks, located a short distance south of Kyovashad. It has arguably the most dangerous boss mechanic of the normal pinnacle bosses, although you can easily bypass this if your build has enough DPS. Be sure you have a strong build before farming the Beast in the Ice.

Living Steel

Best Farm: Helltide – Tortured Gifts

Related Boss: Grigoire (9 Normal, 27 Tormented)

Living Steel always drops from the Tortured Gift chests in Helltide. Standard chests give one Living Steel when opened, while the Gift of Living Steel chest always drops five. The Living Steel chest costs 275 Aberrant Cinders and spawns twice per Helltide. As with all pinnacle bosses, you'll need 27 Living Steel to summon Tormented Grigoire, a deadly automaton located in the Hall of the Penitent dungeon in Kehjistan. Since you can earn Living Steel so easily from Helltide, Grigoire is arguably the most time-efficient boss to farm. A full Helltide clear should give you enough Living Steel to fight Tormented Grigoire at least two times, usually three.

Malignant Heart

Best Farm: Whisper Caches

Related Boss: Varshan (5 Normal, 15 Tormented)

Malignant Hearts are the most annoying to farm. They commonly drop from Whisper Caches. Each cache can drop a heart outright or drop a random body part—head, hand, or bone. These body parts can be exchanged for Malignant Hearts at the Alchemist; they don't serve any other purpose. Beyond caches, you can also find Malignant Hearts from Elite enemies that periodically spawn in Helltide and World Boss fights. Fortunately, you don't need 27 Malignant Hearts to summon a boss. Tormented Varshan only requires 15 Malignant Hearts to summon. You can find her in the Malignant Burrow beside the Tree of Whispers in Hawezar.

Pincushioned Dolls

Drop Source: Beast in the Ice

Related Boss: Andariel (2 Normal, 6 Tormented)

Pincushioned Dolls are a guaranteed reward from Beast in the Ice. A normal difficulty kill will award one doll, while a Tormented kill awards five. Six Pincushioned Dolls are required to summon Tormented Andariel, a pinnacle boss located in the Hanged Man's Hall within Kehjistan. Andariel is easily the hardest pinnacle boss in Diablo 4. Make sure you have a good build before fighting her.

Sandscorched Shackles

Drop Source: Lord Zir

Related Boss: Andariel (2 Normal, 6 Tormented)

Sandscorched Shackles always drop from Lord Zir. Slaying this boss on normal difficulty will award one shackle, while Tormented kills will always drop five. When possible, you should always farm the Tormented variant of this boss. Pincushioned Dolls are also needed to summon Andariel. You only need two shackles for a normal summon, but her Tormented variant requires six.

Shards Of Agony

Drop Source: Grigoire

Related Boss: Duriel (2 Normal, 6 Tormented)

Shards of Agony always drop from successful Grigoire kills. Standard difficulty drops one shard; Tormented spawns five instead. You'll need a total of six stones to summon Duriel, a difficult pinnacle boss located in the Gaping Crevasse dungeon within Kehjistan. You'll also need six Mucus-Slick Eggs to summon them. Be ready for a tough fight.

Mucus-Slick Egg

Drop Source: Varshan

Related Boss: Duriel (2 Normal, 6 Tormented)

The final summoning resource is the Mucus-Slick Egg, which you can earn by defeating Varshan on any difficulty. The normal variant drops a single egg. If you can handle the Tormented variant, you'll earn five eggs instead. This is the second material used to summon Duriel. Normal difficulty requires two Mucus-Slick Eggs, while Tormented difficulty requires six.

Final Thoughts

As of 2026, the core loop of farming pinnacle bosses remains a central pillar of Diablo 4's endgame. While drop rates and material requirements may shift with seasonal updates, the strategies outlined above provide a reliable foundation. Whether you're chasing a specific Mythic Unique or simply looking to maximize your loot per hour, understanding these summoning materials is essential. Happy farming, and may your drops be ever in your favor! ⚔️💎

According to coverage from OpenCritic, a useful way to frame Diablo 4’s pinnacle-boss material grind is to treat it like an endgame progression ladder: players first stabilize their build through repeatable activities (Helltides, Nightmare Dungeons, Whisper turn-ins), then convert those earnings into higher-efficiency boss attempts (especially Tormented summons) where the expected value per material spent is higher—mirroring how many ARPG endgames reward optimizing “inputs” (time and mats) into “outputs” (high-roll uniques and chase items).