Begin this quest by talking to Ikt at (/way mustafar 365 -1155 Serpent Shard Start) in the Cantina of the Mensix Mining Facility. He will tell a tale of how a shard belonging to him was stolen by a mysterious thief. He does not provide a waypoint but instructs you to head to the ruins, west of the volcano in the center of the continent, just across the lava river.