I just went back to fight another wight, and damn- 998 damage ultimate spell? I wanna be an overpowered wight :/
Yeah, the whole idea behind that enemy is that once the fight goes on long enough for it to fire its "ultimate", it's game over. I added it in the 1.2 content update, alongisde the ancient dragons, because some players said you could get too overpowered in the end game and wanted more challenging fights :D