Mending Fences
Thorim at the Temple of Storms wants you to Kill Fjorn and 5 Stormforged Iron Giants at Fjorn's Anvil, east of Dun Niffelem. Using Thorim's Charm of Earth will summon his Earthen to fight by your side. The charm requires a Granite Boulder from nearby Fjorn's Anvil.
If I hope to wrest control of the Temple of the Makers from my brother, I must make amends with my old allies. Perhaps by eliminating a common enemy, we may at least take a step towards renewing my friendship with the frost giants. Fjorn has besieged Dun Niffelem with giants of iron. You must defeat him at Fjorn's Anvil, far to the east of here, and weaken his forces sufficiently for the Sons of Hodir to emerge victorious. Take this charm, <Name>. Use it to summon my earthen to your aid.
You will receive: 
Upon completion of this quest you will gain:
- 22050 experience
- 22000 reputation with The Sons of Hodir