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Diablo 4: Vessel of Hatred (D4)

How to Get Mucus-Slick Egg

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Mucus-Slick Egg is a summoning material needed to fight Duriel in Diablo 4 (D4). Read on to learn more about Mucus-Slick Egg, how to get it, how to use it, and its overview.

List of Contents

How to Get Mucus-Slick Egg

How to Get Mucus-Slick Egg
CheckmarkDefeating Echo of Varshan
CheckmarkDrops from World Boss
CheckmarkSeason Journey Reward Caches

Defeating Echo of Varshan

D4 - Defeating Varshan
The Mucus-Slick Egg can be obtained by defeating Echo of Varshan. Note that as of Season 6 you can fight Varshan starting in any Torment difficulty.

The Mucus-Slick Egg is a guaranteed drop upon defeating Varshan, but only the player who summons Varshan will receive a Mucus-Slick Egg as a reward.

Echo of Varshan Location and Unique Drops

Summoning Echo of Varshan

D4 - Summoning Varshan

You can summon Varshan by using Malignant Hearts inside the Malignant Burrow. You can transmute other Malignant Body Parts at the Alchemist to turn them into Malignant Hearts.

How to Get Malignant Hearts

Drops from World Boss

Shard of Agony World Boss Drop
The Mucus-Slick Egg also has a chance to drop from World Bosses. Keep in mind that World Bosses have spawn times so try to alternate between them.

World Boss Guide

Season Journey Reward Caches

Season Journey Rewards
You can also receive a variety of boss summoning materials by opening the Cache Rewards from completing the Season Journey. This will give you a ton of materials, so make sure not to skip this, as it can help you obtain the necessary uniques you need to progress your character as you prepare for the endgame.

How to Complete Season Journey and Rewards

How to Use Mucus-Slick Egg

Offer in the Pestilent Altar

D4 - Summoning Duriel

The Mucus-Slick Egg can be offered in the Pestilent Altar located inside the Gaping Crevasse dungeon. You would need a total of 2 Mucus-Slick Egg together with 2 Shard of Agony, to summon and fight Duriel.

Gaping Crevasse Location

The Interactive Map both shows the location of key points on the map, and doubles as a collectible checker.
  1. Click an icon on the right side to show all the pins of a specific type, or click the magnifying glass button to search for a specific pin by name.
  2. Click a pin on the map to see its name and description, and a relevant picture or video if available.
  3. From here, click Mark as Acquired to indicate that you've gotten a collectible already. This will change its icon on the map to show that it has been collected, and add 1 to that pin type's Counter.
  4. To undo this, click on the same pin and click Restore to unclaimed.
  5. To check how many pins you have marked so far, check the Counter in the bottom left, and click the icon that looks like a checklist to see counters for all pin types.
  6. If the collected pins start to get in the way, you can hide them all by clicking the green Show Pins button on the left side.
Icon How to Use
Name Button.png Show Names
This button reveals the Name of every icon currently shown.
Show Pins Button.png Show Pins
This button will toggle between showing and hiding all the pins which you have already marked as acquired.
Full Button.png Fullscreen
This button will change the map display to fill the screen.
Search Button.png Search Mode Toggle
This button will display a searchbar which you can use to search for an individual pin by its name.
Icon Mode Button.png Icon Mode Toggle
In Search Mode, this button will toggle you back to Icon Mode, removing the search bar and displaying the icons again.
All Pins Button.png All Pins
This button is shown along with the Icons on the right when there are over 6 types of pins. Click it for a full selection of all available pin types.
Interactive Map Counter.png Counter
Tracks the number of pins you have of a certain type. The pin type shown is set to the page and currently cannot be changed; however, all pin type counters can be viewed by clicking the checklist icon on the right side.
Interactive Map View All Counters.png View All Counters
This icon is found on the right side of the Counter. When a map has more than one pin type, click this icon to see Counters for all pin types.
Diablo 4 - Zoom In Zoom Out Icons.png Zoom In / Zoom Out
This icon is found on the top left side of the map. You can press these buttons, or use your scroll wheel while hovering, to Zoom In and Out of the interactive map.

Note that the Gaping Crevasse will only appear on the map in Torment difficulties.

Mucus-Slick Egg Overview

Mucus-Slick Egg Description

D4 - Mucus-Slick Egg Icon Type Consumable - Magic Summoning
Sell Value 50,000 Gold
Description Merged in Gaping Crevasse in southern Kehjistan with Shard of Agony to summon a powerful enemy. Requires 2. Acquired from Malignant Burrow in Torment difficulties only by the one who performs the summoning.

Diablo 4 Related Guides

Diablo 4 - Items

List of All Items

All Item Categories

Diablo 4 Item Categories
Diablo 4 - Upgrade MaterialsUpgrade Materials Diablo 4 - CurrenciesCurrencies Diablo 4 - ConsumablesConsumables

All Uber Bosses and Required Materials

Uber Boss Required Materials
Lord Zir ・Exquisite Blood
Echo of Varshan ・Malignant Heart
Grigoire ・Living Steel
Duriel ・Mucus-Slick Egg
・Shard of Agony
The Beast in the Ice ・Distilled Fear
Echo of Andariel ・Sandscorched Shackles
・Pincushioned Doll
Uber Lilith None

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