Thorgal - tome 11 The invisible fortress

Still travelling with Kris of Valnor, Thorgal runs afoul of a local tribe. When a mysterious old woman offers him a chance to escape the hostile villagers, he accepts. But there's more to the bargain: She says that if he can make his way into the Invisible Fortress, he'll be able to erase his name from the Stone of the Gods, cancelling his destiny—and finally have a chance at a normal life.