Legend
This quest has no legend.
Dangers
Lots of creatures in the quarters of Yalahar (including Azerus), plus Scorpion, Slime, Tarantula, Haunted Treeling, Demon Skeleton, Vampire, Elder Bonelord, Energy Elemental, Bonelord, Banshee, Bat, Giant Spider, Hellspawn, Nightmare, Nightmare Scion, Nightstalker, Mutated Bat, Poison Spider, Spectre, Werewolf, War Wolf, Vampire, Zombie, Vampire Bride, Fury, Dark Torturer, also some boss monsters like Boreth, Lersatio, Marziel, Arthei and some more.
Reward
Yalaharian Outfits and only one of two addons, with their respective achievement: Yalahari of Wisdom or Yalahari of Power 
Note: this outfit quest is special, because you will only be able to obtain one of two available addons, not both.
Outfit[]
Complete the In Service of Yalahar Quest.
Sage Addon[]
Required Equipment[]
- Vampiric Crest (obtained through the Blood Brothers Quest).
Method[]
After completing the Blood Brothers Quest, bring the Vampiric Crest to Palimuth in Yalahar, if you choose Palimuth's side in mission 9 of the Yalahar main quest you will get this addon.
Villain Addon[]
Required Equipment[]
- Vampiric Crest (obtained through the Blood Brothers Quest).
Method[]
After completing the Blood Brothers Quest, bring the Vampiric Crest to Palimuth in Yalahar, if you choose Azerus' side in mission 9 of the Yalahar main quest you will get this addon.