1. The Protectors of Hyjal
2. When you accept the quest you don't get the four NPCs that should be summoned to assist you.
3. After you accept this quest you should have four NPCs waiting to assist you in Sethria's Roost while you kill the Invaders.
"For the quest The Protectors of Hyjal, a group of four druid NPCs will join you in Sethria's Roost to help kill the elites. Occasionally one of the druids will be replaced with a named NPC you may have met before." By Inexorability Source
"This elite group waiting for you consists of four Hyjal Protectors. Sometimes one of them will be replaced by a random NPC you have worked with before. The possible options for the random NPC are:
Earthmender Norsala, Hemet Nesingwary, Linken, King Mrgl-Mrgl, High Warlord Cromush, Choluna, Russel Brower, Nat Pagle, Mankrik (!), Chromie, Lunk, Mog'ogg the Wizened, Broll Bearmantle, Jonny Awesome, Budd, Gurgthock Tony Two-Tusk, Hobart Grapplehammer, Fleet Master Seahorn, Thassarian, Calder Gray, the Leaper, Gidwin Goldlocks, Theldurin the Lost." By ArgentSun Source
4. 09/24/2016
5. x100
6. 3/10
Here is a video showing how to get the achievement:
Comments: You CAN complete the quest The Protectors of Hyjal by killing the Invaders, the quest is working but not as intended.
The only reason I'm reporting this quest is because the NPCs that the quest summons to assist you are required for the achievement Have... Have We Met? and this achievement is needed for Veteran of the ****** Front which gives you the title The Flamebreaker.
