Diablo 4 Summoning Bosses

Name Icon Description
Living Steel Living Steel - Diablo 4
Forged in Hall of the Penitent within central Dry Steppes to summon a powerful enemy. Requires 2 in World Tier 3 and 5 in World Tier 4. Found in Helltides from Tortured Gift of Living Steel.
Warm to the touch.
Distilled Fear Distilled Fear - Diablo 4
Used by the Occultist to craft a Nightmare Sigil to enter Glacial Fissure. Requires 9. Collected from Tier 30+ Nightmare Dungeons.
An ink that reflects no light. You find yourself acutely aware of your own mortality.
Mucus-Slick Egg Mucus-Slick Egg - Diablo 4
Merged in Gaping Crevasse in southern Kehjistan with Shard of Agony to summon a powerful enemy. Requires 2. Acquired from Malignant Burrow in World Tier 4: Torment only by the one who performs the summoning.
A powerful, nascent being wriggles within.
Shard of Agony Shard of Agony - Diablo 4
Merged in Gaping Crevasse in southern Kehjistan with Mucus-Slick Egg to summon a powerful enemy. Requires 2. Acquired from Hall of the Penitent in World Tier 4: Torment only by the one who performs the summoning.
A broken soulstone. Simply holding it sends a dull ache through your arm.
Exquisite Blood Exquisite Blood - Diablo 4
Used in Ancients’ Seat within The Darkened Way in Fractured Peaks to summon a powerful enemy. Requires 9. Collected from World Bosses and Legion Events.
You can almost feel a heartbeat through the glass.
Gurgling Head Gurgling Head - Diablo 4
Assembled beneath The Tree of Whispers within Malignant Burrow to summon a powerful enemy. Collected from Whisper caches.

Can be Refined at the Alchemist.

Some turbid liquid dribbles from its mouth.
Blackened Femur Blackened Femur - Diablo 4
Assembled beneath The Tree of Whispers within Malignant Burrow to summon a powerful enemy. Collected from Whisper caches.

Can be Refined at the Alchemist.

It stinks of sulfur and rot.
Malignant Heart Malignant Heart - Diablo 4
Assembled beneath The Tree of Whispers within Malignant Burrow to summon a powerful enemy. Collected from Whisper caches.
Its muscles convulse arrhythmically.
Trembling Hand Trembling Hand - Diablo 4
Assembled beneath The Tree of Whispers within Malignant Burrow to summon a powerful enemy. Collected from Whisper caches.

Can be Refined at the Alchemist.

Pus oozes from under its fingernails.

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