Muradin was also one of the founding members of the dwarven Explorers' Guild, which was dedicated to exploration and archeology across the world. In his travels, Muradin visited Northrend and became fascinated with the desolate continent. He returned to it often, observing its ferocious natives and sketching its ruined architecture. It was during one expedition to Northrend in search of the runeblade Frostmourne that Muradin met Arthas for the final time. In his obsession to destroy the Dreadlord Mal'ganis, Arthas had Muradin lead him to Frostmourne, betraying his own men in the process.