How to summon Uber Duriel and the other endgame summonable bosses in Diablo 4
The Diablo 4 team continues to add more endgame activities for players in both the eternal and seasonal realms. First, they introduced five additional bosses to fight in Season 2, plus the Echo of Malphas as the end boss in Season 3. These bosses offer additional challenges for World Tier 3 and 4 players, new fights that are “not for the faint of heart,” but the high risk involved in these encounters means equally high rewards.
Season 2’s unique bosses include five encounters: Echo of Varshan (from Season 1), Grigoire the Galvanic Saint, The Beast in the Ice, Lord Zir (from Season 2), and the Echo of Duriel, with Duriel being the most difficult encounter in the game aside from the Echo of Lilith. Each of the five encounters has a loot table with specific cosmetics and Unique gear; Duriel also drops Uber Uniques. That means you can farm encounters for the specific loot you want, though it will take some effort to summon the boss you want. Each boss requires certain materials to summon it, and Duriel requires materials dropped by other Uber bosses.
Here’s how to summon the endgame bosses in Diablo 4.
World Tier 3 is your first opportunity to fight these foes, with two bosses to summon:
- Grigoire, the Galvanic Saint (loot table)
- Location: Hall of the Penitent in Dry Steppes.
- Level: 55 (WT3), 75 (WT4)
- Materials: Living Steel (two on WT3, five on WT4), dropped from Tortured Gifts of Living Steel in Helltides.
- Details: Much like Tortured Gifts of Mysteries, the Tortured Gifts of Living Steel appear as orange chest icons on the Helltide’s map. Farm Cinders from the Helltide as long as possible; the chests take a whopping 300 Aberrant Cinders to open. Once you have your steel, head to the Hall of the Penitent to summon him.
- The Echo of Varshan (loot table)
- Location: Malignant Burrow at the Tree of Whispers in Hawezar.
- Level: 55 (WT3), 75 (WT4)
- Materials: One each of the Parts of Varshan’s Body — Trembling Hand, Blackened Femur, Gurgling Head, plus a Malignant Heart for WT4.
- Details: Farm the three parts of Varshan’s body from Grotesque Debtors that appear at the end of Whispers events and the Tree’s reward caches; combine them in Malignant Burrow at the Tree of Whispers to summon Varshan. On World Tier 4, you’ll also need a Malignant Heart, which only drops from the Tree of Whispers reward caches on World Tier 4. There is a way to offset this amount of items, however: your local friendly alchemist can turn one kind of body part into another one for only a few crafting materials. The non-Heart body parts can be turned into a bag that has a chance of dropping any of the three body parts, while spare Malignant Hearts can be turned directly into one of the other body parts.
The remaining bosses are exclusive to the hardest difficulty. Along with Grigoire and the Echo of Varshan, here are the other bosses you can summon on World Tier 4:
- Lord Zir (loot table)
- Location: The Darkened Way in Fractured Peaks.
- Level: 75
- Materials: Nine Exquisite Blood, dropped from WT4 World Boss fights and Legion Events.
- Details: It’s worth noting that both events that drop Exquisite Blood are also Whispers events, meaning you can frequently find Grotesque Debtors for Varshan’s body parts there as well — two birds with one stone. Once you have your Exquisite Blood, you’ll want to head to The Darkened Way and, from there, further down into the Ancient’s Seat. Besides his regular loot, Zir can drop a cosmetic helm unique to this fight.
- The Beast in the Ice (loot table)
- Location: Glacial Fissure in Fractured Peaks.
- Level: 85
- Materials: Glacial Fissure Nightmare Sigil, crafted at the Occultist with nine Distilled Fear and 250 Sigil Powder.
- Details: You must craft a Glacial Fissure Nightmare Sigil to summon the Beast. To do so, collect 9 Distilled Fear from Tier 30+ Nightmare Dungeons and combine them at the Occultist as you would craft normal sigils. The drop rate for Distilled Fear was increased as of patch 1.3.0 — they are guaranteed drops at the end of a Tier 30+ NMD, and every 10 Tiers after Tier 30, there’s an increasing chance for additional Distilled Fears to be rewarded. Completing Tier 90 Nightmare Dungeons and beyond will always grant 3 Distilled Fears. Unlike the short sets of tunnels you traverse to summon the other bosses, Glacial Fissure is an actual dungeon-length area complete with random elites, packs of enemies, Nightmare Dungeon boons and banes, etc. You can even teleport directly there, just like a normal Nightmare Dungeon!
- Echo of Duriel (loot table)
- Location: Gaping Crevasse, just southwest of Gea Kul in Kehjistan
- Level: 100
- Materials: Two Mucus-Slick Eggs (dropped by WT4 Varshan) and two Shards of Agony (dropped by WT4 Grigoire)
- Details: The Lord of Pain did not appreciate players thwarting him in Caldeum during Act 6, and his echo wants revenge. Luckily, he didn’t bring his camera-blocking walls and super-tiny arena with him this time. To summon him, farm Mucus-Slick Eggs and Shards of Agony — two of each — from Varshan and Grigoire, respectively, on WT4. Afterward, head to the Gaping Crevasse south of Gea Kul in Kehjistan to summon Duriel, and cross your fingers for a Shako! Out of the five new bosses, Duriel is your only chance to earn Uber Unique items (as well as a chance at a new mount).
Finally, the Season 3 end boss is an additional WT4 fight requiring summoning materials from the Season itself:
- Echo of Malphas (loot table)
- Location: Vault of the Loom
- Level: 100
- Materials: 10 Igneous Cores and 250 Shattered Stone
- Details: The Igneous Cores can drop from Vault Heralds and the Son of Malphas Vault boss in WT4.
Be aware that to fight these bosses, you require all the summoning items every time, so make sure you’re ready for the fight before you go in — and hold onto any extra materials that drop, to summon them again for more chances at loot. Apparently, these massive reinforcements from the Burning Hells fully expect to be able to grind us into dust. Summon them up and prove them wrong!
Originally published October 6, 2023; updated January 28, 2024, with contributions by Phil Ulrich
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