In Diablo 4, the Echo of Duriel was introduced in Season 2 as one of the most challenging endgame bosses. To summon and defeat him, players need to collect rare materials and be well-prepared for a difficult encounter. Echo of Duriel is also a key source for some of the best loot in the game, including Mythic Uniques and a unique mount. As of Season 5, notable changes have been made to the drop rates of these items, making the fight even more rewarding.

Here's a detailed guide on how to summon Echo of Duriel, the materials you need, how to farm them, and the rewards you can expect.

How to Summon Echo of Duriel

To summon Duriel, you must collect specific rare materials, and there are two versions of the fight: the normal version and the Tormented version. The Tormented version of Duriel is more challenging but offers better loot.

Normal Duriel Summon

For a standard Duriel summon, you will need:

2 Mucus-Slick Eggs

2 Shards of Agony

Tormented Duriel Summon

The Tormented Duriel fight requires:

6 Mucus-Slick Eggs

6 Shards of Agony

1 Stygian Stone

Once you have the materials, head to the Gaping Crevasse in Gea Kul. There, you will find an altar where you can sacrifice the materials to summon Duriel. The Tormented version is significantly tougher and requires high-level preparation.

Farming Summoning Materials

The materials required to summon Duriel drop from other endgame bosses, and gathering them can be time-consuming. Below are the most efficient methods to farm these materials.

Mucus-Slick Eggs

Mucus-Slick Eggs are obtained by defeating Echo of Varshan in World Tier 4.

This drop is not guaranteed, so it may take several fights to get the eggs.

Only the player who initiates the Echo of Varshan fight has a chance for the egg to drop, so solo players or the summoner in a group need to farm it directly.

Shards of Agony

Shards of Agony are dropped by Grigoire, The Galvanic Saint.

Like the Mucus-Slick Eggs, Shards are not guaranteed to drop in a single fight, so farming Grigoire multiple times may be necessary.

Stygian Stone (Tormented Duriel Only)

The Stygian Stone, needed only for the Tormented Duriel summon, is a rarer material. It can be found by completing high-tier activities and events in World Tier 4.

Players should focus on world bosses, dungeons, and high-difficulty activities to increase their chances of obtaining this material.

Echo of Duriel Boss Fight

Duriel is a max-level boss that deals significant Poison damage, so capping your Poison Resistance is critical. If you're struggling to survive his poison-based attacks, consider adjusting your build to increase your resistance or equipping gear with high poison defense.

Before attempting the fight, make sure to:

Max out your Poison Resistance.

Use your best gear for your build.

Unlock all available Paragon Points and upgrade Glyphs to maximize your power.

The Tormented version of Duriel is much stronger than the standard version, and players will need to approach the fight with extra caution. It's advisable to team up with other high-level players for this encounter.

Rewards for Defeating Echo of Duriel

Defeating Echo of Duriel is highly rewarding, especially with the increased drop rates introduced in Season 5. The loot includes Unique and Mythic Unique items, which have seen their drop rates increase from 1.5% to 7.5%. Duriel also drops a unique Smoldering Brimstone Mount.

Here are some of the notable Unique and Mythic Unique items that can drop from Duriel:

Unique Items:

Barbarian: Azurewrath, Doombringer

Druid: Tempest Roar, Dolmen Stone

Necromancer: Black River, Blood Moon Breeches

Rogue: Cowl of the Nameless, Scoundrel's Leathers

Sorcerer: Flamescar, Blue Rose

Mythic Unique Items:

All Classes: Godslayer Crown, Harlequin Crest, Melted Heart of Selig

Barbarian: Tuskhelm of Joritz the Mighty, The Grandfather

Druid: Ahavarion, Spear of Lycander

Necromancer: The Grandfather, Doombringer

Sorcerer: Ahavarion, Spear of Lycander

In addition to these powerful items, players can also earn the Smoldering Brimstone Mount, a cosmetic reward that sets you apart from other players.

Conclusion

The Echo of Duriel is one of Diablo 4's most challenging and rewarding endgame bosses. While gathering the materials needed to summon him can be time-consuming, the loot—including Mythic Uniques and the exclusive mount—makes the effort worthwhile. Be sure to prepare adequately before taking on this formidable foe, especially if you're attempting the Tormented version, and enjoy the thrill of overcoming one of the game's toughest challenges!