Right at the start of your journey to level 120, you will be summoned by Магни Бронзобород to Silithus to retrieve the Сердце Азерот. Wearing this necklace you will be able to collect a new type of power: Азерит, the Blood of Azeroth.
The necklace allows you to empower your helm, shoulders and chest pieces, called Azerite Armor, unlocking new exciting powers hidden within those items. Collecting Азерит will increase the level of Сердце Азерот and empower those items, unlocking even more abilities. For more details about how to unlock and empower the Сердце Азерот check our in-depth Azerite guides:
Azerite Trait UI