Right at the start of your journey to level 120, you will be summoned by 마그니 브론즈비어드 to Silithus to retrieve the 아제로스의 심장. Wearing this necklace you will be able to collect a new type of power: 아제라이트, 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 아제라이트 will increase the level of 아제로스의 심장 and empower those items, unlocking even more abilities. For more details about how to unlock and empower the 아제로스의 심장 check our in-depth Azerite guides:
Azerite Trait UI