"Some of the Lord of Terror’s strongest allies have reared their abhorrent heads in Sanctuary. Rayek needs your help more than ever to return these abominations to the Hells."
- Group description(src)
The Dreadbirth is a group of demons allied to Diablo.
Lore
In-game
The Dreadbirth are Helliquary bosses in Diablo Immortal, introduced as part of the Shattered Sanctuary update.