In Diablo 4, Duriel Mats (Duriel Materials) refer to special crafting materials that are required to summon and fight the boss Duriel, one of the game’s pinnacle world bosses. Duriel is part of the Season of Blood and appears as a challenging endgame boss fight. These materials are used to craft specific items that allow players to initiate the battle against him.

What Are Duriel Mats?

Duriel Mats are unique crafting materials that drop from other high-level bosses in the game and are used to create a summoning item required to access Duriel's fight. The crafting materials include:

Mucus-Slick Egg
Demons' Heart
These are rare drops from Echo of Varshan and Grigoire, The Galvanic Saint, other powerful bosses introduced in Diablo 4’s seasonal content.

How to Get Duriel Mats:

Defeat Echo of Varshan: Echo of Varshan is a seasonal boss that can drop Mucus-Slick Eggs as part of the Duriel summoning material.
Defeat Grigoire, The Galvanic Saint: Grigoire is another tough boss whose defeat may reward players with Demons' Hearts, another required material.
Loot Drops: Duriel Mats are often considered rare loot and drop more frequently in higher difficulties and world tiers. You must farm these bosses multiple times to gather the required materials for Duriel.
How to Summon Duriel:
Once you have collected the necessary Duriel Mats (Mucus-Slick Egg and Demons' Heart), you can use them to craft an item or ritual that summons Duriel. This process is generally completed at specific altars or crafting stations within the game.

Fighting Duriel is a key challenge in Diablo 4’s endgame, and defeating him rewards players with powerful loot, gear, and rare crafting materials.