Diablo 4 Harbinger Boss Guide
How to Summon Harbinger
To fight Harbinger you first need the summoning materials below, then open its Hoard at the boss' lair. These Lair Boss Keys and materials drop in Torment difficulties from endgame activities — hover each material, or read below, for exactly where to farm it.
1x
Greater Lair Key
- Greater Lair Key — Used to open a Greater Lair Boss Hoard.
Harbinger Drop Table
Where does your loot drop?
Want the full picture of which boss drops what? Our Loot Table lists every item and its sources in one place.
Open the Loot Table →Frequently Asked Questions
Where do I find Harbinger in Diablo 4?
Harbinger is summoned in a dedicated lair and has no fixed spot in the open world. The entrance appears on the map once you hold the summoning materials.
How do I summon Harbinger?
Summoning Harbinger requires 1× Greater Lair Key. Place the materials at the altar in front of the lair.
What does Harbinger drop?
Harbinger drops 23 uniques, among them Bane of Ahjad-Den, Blood Wake, Bridle of Tor'Baalos, Etna's Lost Dagger, Flameweaver, Fleshrender. Mythic Uniques can drop on top of that, at the same rate as from any other uber boss.