Description: Hard mode is indeed hard. In order to enable Thorim's hard mode you must complete the tunnel gauntlet in under 3 minutes. Doing this will make Thorim's wife Sif attack the raid with him. She has several abilities which deal heavy AOE damage to the raid - mainly Frost Nova and Frosbolt Volley. She will also cast a Blizzard similar to Sapphiron and Shade of Aran. Adding Sif to the encounter adds a very unique challenge.