Thundermace's Ruins is an island in the Alsius initiation zone, to the South West of Eternal White Island, connected by bridge. Fyrkat Port can be found here but it's deserted. The only living NPC in the area is Olbross Rainmace, as the other one is the unresting spirit of thudermace. This is the highest level area in Alsius initiation zone, and level 10 can be reached by leveling here. Old remains from Thundermace's longboats are scattered through the ruins. Also, the mob leader skeleton mob leader can be found here.