Brood of Nozdormu
Brood of Nozdormu is one of the reputations from Classic WoW. The Brood of Nozdormu consists of members from the Bronze Dragonflight. The leader of the Brood of Nozdurmu reputation, Anachronos, can be found outside Caverns of Time in Tanaris. Players will start out at 0/36000 with the Brood of Nozdormu, the lowest reputation level you can be.
In order to raise your reputation with the Brood you will need to run Aq20/40. Killing trash in these two instances will grant you reputation up to 2999/3000 through neutral. Past this you will need to kill bosses and turn in Qiraji Lord's Insignias or Ancient Qiraji Artifacts. The Insignias can be found off bosses in Aq40. The Artifacts can drop off trash in Aq40, when one does drop the whole raid will be able to loot it.
Since you stop gaining reputation from killing tash at Friendly, It is highly recommended that you wait and turn in your Artifacts/Insignia's when you reach that reputation level. This will cause you to have to grind a whole hell of a lot less in the long run. If you're trying for the achievement, expect this reputation to take about a month or a month in a half to grind out. Good luck and hang in there!