Start from Sifhalla (or alternatively Olafstead and go north), zone into Drakkar Lake and follow the quest marker to the Stone Summit's encampment in the caves. There will be a great number of Stone Summit at the encampment. Careful pulling is advised — the groups have multiple healers and it's easy to become overwhelmed. A Minion Master and Scourge Healing can make this quest much easier. Note: Dvalinn Stonebreaker's group does not need to be killed to complete the quest; only the other groups need to be defeated.