This are the locations where the mobs are u need to kill. No need to loot them just hit them untill they leave a buff on you and move to next location. And the mobs don't have to have the same name as mentioned like with the furbolgs u got different names running around but all can give the buff.
1. Chillwind Chimaera
2. Shardtooth Bears
3. Icethistle Yeti
4. Wildkin
5. Frostmaul Giants
6. Frost Saber
7. Winterspring Furbolg