- The quest Servant of N'Zoth automatically failed because my quest log was full
- I abandoned the quest Servant of N'Zoth and cannot pick it up again
- Kills aren't counting for the quest
To start the quest Servant of N'zoth you must first earn the Alliance Assassin or Horde Assassin buff by killing 10 players of the opposite faction without dying in Kul Tiras or Zandalar. You will lose the buff if you leave the zone or disconnect.
Once you have the buff, you must have space in your quest log and inventory and you will be able to accept the quest Servant of N'zoth. If your quest log or inventory are full, you won't be able to accept the quest. Leaving the zone or logging off will not help, since you will lose the Alliance Assassin or Horde Assassin buff.
Once you have the quest, you will receive the item N'lyeth, Sliver of N'Zoth which, when used, transforms you into the Servant of N'Zoth for one hour. Under the effect of Servant of N'Zoth, you have one hour to kill 10 players without dying. Your quest will fail if you die or if you take longer than one hour.