- Humming Azerite Heart
- "Grants X Artifact Power to your Heart of Azeroth."
Humming Azerite Heart can be obtained from the emissary quests, 
[10-50] Azerite for the Horde, 
[10-50] Azerite for the Alliance, and 
[50R] Battle of Dazar'alor.
Patch changes[]
Patch 8.2.0 (2019-06-25): Now rewarded from all emissary quests. - Patch 8.0.1 (2018-07-17): Added.
