Lichdragon Fortissax is an optional Legend Boss in Elden Ring. In the war of Leyndell, he battled Godwyn the Golden and lose, but was spared by him and befriended, leading to the peace treatly between both sides and the rise of the Leyndell Ancient Dragon Cult. After Godwyn was slain and his body corrupted by death, Fortissax battled the death inside of his friend's corpse but was also corrupted by it.