are these sentences worded in the best way?

As they were traveling through the wilderlands of the Crags, the group was attacked by the fearsome lich Ebonsoul, who had been seeking Regis. The friends could not defeat Ebonsoul, but Catti-brie managed to trap the undead wizard within the magical gemstone that was supposed to be used to ensnare Pwent’s soul. Although their original plan was now ruined, the group decided to continue their journey to Gauntlgrym.