Last Edited:  18 Nov 2009

For the Achievements:

Frostbitten

 &

Northern Exposure

The Achievements Frostbitten and Northern Exposure involve killing extremely rare NPCs in Northrend.  When the first Rare NPC (listed below) is killed, the achievement Northern Exposure is completed.  The player is then given a new achievement, Frostbitten.  To complete Frostbitten, the player must kill ALL of the rare NPCs listed below.

*Note: There appear to be five of these that spawn immediately after a server-restart.  Three are in Howling Fjord; King Ping, Vigdis, Perobas. The other two are Griegen (Zul'Drak) and  Icehorn (Borean Tundra).

If you are a WoW player and want to hunt down these rare NPCs, I suggest you obtain the addons:

_NPCScan and _NPCScan.Overlay