Harbinger Nodes (Delve): In the Azurite Mine (Delve), specific nodes can spawn Harbingers.
Engage the Minions: Once a Harbinger appears, it will spawn waves of enemies around it. These are the ones you need to defeat to damage the Harbinger.
Focus on Clearing: Prioritize quickly clearing each wave of enemies. The faster you eliminate them, the faster the Harbinger takes damage.
Harbinger Attacks: While you focus on the minions, the Harbinger will unleash attacks on you. Be aware of these attacks and utilize movement skills or defensive measures to avoid taking excessive damage.
Defeat and Loot: Once all enemy waves are cleared, the Harbinger will be defeated. You'll then be able to interact with its remains to collect rewards, which primarily consist of various currency shards. These shards combine to form full currency orbs.
Additional Tips:
Area Level: Higher area level maps generally have stronger Harbingers with potentially better rewards.
Build Choice: Builds that excel at clearing large groups of enemies are effective against Harbingers.
Damage Reflection: Be cautious of some Harbingers that can reflect a portion of your damage back at you. Adjust your tactics if necessary.
Remember, Harbingers can be challenging depending on your build and gear. Start with lower-tier maps to get comfortable with the mechanics before progressing to higher difficulties.