Hi just a Quick one did Arthas or the L K build icecrow or was it there before?
The name of Icecrown became infamous when Kil'jaeden hurled the Lich King back into the mortal world. Ner'zhul's prison slammed into the glacier. Here the Lich King remained until Arthas Menethil freed him and the two merged in Arthas' body. The merging created such a large explosion that a large portion of the glacier was blown away. It left a gigantic spire of ice: the Frozen Throne, upon which sits the Lich King, ruler of the Scourge. From this, they build the fortress. http://wow.gamepedia.com/Icecrown_Citadel