Mohg, the Lord of Blood, is a powerful demigod located in the Mohgwyn Dynasty Mausoleum, which can be reached from the Consecrated Snowfield. To get to Mohg from the Frost Area, follow these directions:
From the Frost Area, head southwest towards the cliff face. You will see a large waterfall in the distance. Go to the waterfall and use the Torrent to jump across. Once across, follow the path to the left. You will come to a large, open area with a group of enemies. Defeat the enemies and then continue following the path. The path will eventually lead you to a cave entrance. Enter the cave and follow the path inside. You will come to a large chamber with a Site of Grace. Rest at the Site of Grace and then continue following the path. The path will eventually lead you to a large, open area with a boss fight. Defeat the boss and then continue following the path. The path will eventually lead you to the Mohgwyn Dynasty Mausoleum. Enter the mausoleum and follow the path inside. You will eventually come to a large chamber with Mohg, the Lord of Blood. Defeat Mohg to obtain his Great Rune.
