The "Hunt for the Harbinger" is a story questline (Patch 10.2.7) that sets the stage for the War Within expansion.
The "Harbinger" refers to both a challenging exotic mission and a prestigious player title. The Harbinger Mission (Hawkmoon)
: They change tactics and gain new abilities as their health drops. Destiny 2: The Harbinger Mission & Title The HarbingerHD
: Focuses on Alleria Windrunner tracking a mysterious Void entity known as Xal'atath (The Harbinger).
: While they summon minions, prioritize the Harbinger; minions usually vanish once the boss dies. The "Hunt for the Harbinger" is a story questline (Patch 10
: This mission allows players to obtain random rolls of the Hawkmoon Exotic Hand Cannon and its catalyst.
In Last Epoch , Harbingers are a series of 10 end-game bosses introduced in the "Harbingers of Nemesis" update. Destiny 2: The Harbinger Mission & Title :
: Complete all five phases without allowing a single sacrifice. World of Warcraft: The Harbinger Questline