Duramboros was my first wall in Ultimate. Used up all my healing items and the thing took me 44 minutes to kill. He'd dig across the map and nap while I trekked there and once I showed up, he'd dig right across the map again. Which made killing him all the more grand. What a rush. Oh, and that helicopter move he does is priceless.
Also, what kind of name is Nibelsnarf?