I'm just tired of him after he pulled the same "gonna fight you and run away" trick three times. I just can't take him seriously as as threat. Let him get a noble death and pave the way for more compelling villains. Preferrably ones that are actually villainous, have a more nuanced personality than Nidhogg, and have their own musical themes beside the standard Garlean theme and a remix of Rise of the White Raven. Oh and make sure they have a more direct role in current events (looking at you, Elidibus).