You must be at least Level 85 to receive this quest.
Steps
look for lost Clan Gragnar kobolds - path starts at ( -324, 387, 931 ) Copy/waypoint -324, 387, 931, go along ledge, through cave, through another ledge,then another cave, quest updates around ( -579, 478, 891 ) Copy/waypoint -579, 478, 891 "found a small group of Gragnar"
find something which proves existance of clan Gragnar: update comes from a Gragnar hoarder at ( -562, 478, 946 ) Copy/waypoint -562, 478, 946 in corner of that cave, loot "an ancient helm" small chest drop go back to kalaish
find a lost scout Ozlem Fatar who never returned from patrol in the mountains: his body is at ( -174, 372, 928 ) Copy/waypoint -174, 372, 928, examine it ( you find his journal) bring journal back to Kalaish
go talk to Khaliq Keshalian near Quel'ule, by launch pad: help him recover voidcraft controler from terrofangs - update comes in small chest from a wandering mob among terrorfangs called "a terrorfang plunderpaw" (he can currently assasinate you, root or kite or use pet, wanders near ( -118, 270, 168 ) Copy/waypoint -118, 270, 168 - loot a smashed voidcraft controller from him
talk to Khaliq, then talk to him again after his failed experiment
activate controller he gives you at the edge of Cleft of Tranquility green message across your screen will indicate a suitable location, around ( 51, 447, 243 ) Copy/waypoint 51, 447, 243 at the end of the cliff up north
go back to Khaliq
search the sources of magical anomaly
go to gruengach cave, entrance to cave is at ( 370, 275, 165 ) Copy/waypoint 370, 275, 165
kill Xosith the Greedy ( in cave keep to the right to find him, he stands at the beginning of next large room) loot large iron key from him
find chest in the other chamber in that cave at ( 283, 227, 78 ) Copy/waypoint 283, 227, 78 and open it quest finishes
