A couple of links that might relate to the NPCs you need to kill for "Bane of Hyperboreans (Adventuring/Hunting/Hyperborean Hunting)", found late at night after logging out of game, will check another time to see if the Achievement they list is correct:
Compiled list:
http://joharaoc.eu/baneof
AoC forum post that prompted Joharaoc to start his list & a place to post in new finds for the community (if you are that way inclined)
http://forums.ageofconan.com/showthread.php?191292-Karla-of-the-Shadowvale