For this guy, basically take the Grim Reaper and engulf him in pure darkness. He's also 5x stronger than Grim Reaper, so every thing GR resists, multiply by 5 for DR. Also health.
I wouldn't mind if the had at least one cuss word. Something like crap. It's not entirely a cuss word. I actually recall someone saying crap in a disney show. A DISNEY show, but there was no commotion.