Into the Nether

To access the Socrethar quest line for 7.3.5, you need to pledge allegiance to either the Scryers or Aldor. In order to do so, you need to do the entrance quests in Shattrath, A'dal and the follow-up escort quest City of Light.

Nether-Stalker Khay'ji has a blue question mark above him which over writes the yellow quest icon even if your track low level questing option is turned on. He starts Request for Assistance which will lead to several quests, rewards Key to the Arcatraz

Consortium Part
WoWhead only displays the quest Full Triangle as required for The Consortium section of Into the Nether.

However, it requires all 4 of the following quests:

Nexus-King Salhadaar
Full Triangle
Success!
Securing the Celestial Ridge

Macro to check your progress:

/script for k,v in pairs({["Nexus-King Salhadaar"]=10408,["Full Triangle"]=10276,["Success!"]=10440,["Celestial Ridge"]=10274})do print(format("%s: %s", k, IsQuestFlaggedCompleted(v) and "\124cff00ff00DONE\124r" or "\124cffff0000NOT DONE\124r")) end

Socrethar Part
Choosing either Aldor or Scryer is necessary in order to complete the "Socrethar" portion of this achievement.

The Aldor Macro to check your progress:

/run local y={568,571,574,575,622,628,705,706,707,708,944,946,947,948,949,985,958,957,959}print"The Aldor:"for i,q in ipairs(y)do q="10"..q print(i,"\124cffffff00\124Hquest:"..q.."\124h["..q.."]\124h\124r",IsQuestFlaggedCompleted(q)and YES or NO)end

The Scryers Macro to check your progress:

/run local y={683,684,685,686,622,628,705,706,707,708,944,946,947,948,949,985,958,957,959}print"The Scryers:"for i,q in ipairs(y)do q="10"..q print(i,"\124cffffff00\124Hquest:"..q.."\124h["..q.."]\124h\124r",IsQuestFlaggedCompleted(q)and YES or NO)end