This is a nice picture. I'm a little confused though, is that supposed to be the Grim Reaper and his brother? I think I know the answer to that, But besides that it looks really cool, one of my endless favorite pictures. I like how Grim's Scythe is made of bone. I also like the colors of this picture, really looks like darkness and stuff, not like the "You can't see outside" kind of darkness. Maybe you should make a series with these characters, who knows? I think if they are the Grim Reaper and his brother put them in the underworld, if you can. I'm looking forward to see what you make with these guys.
I like the way you made it, there are things you could work on, for example the hands, but that's something that everyone has trouble with so don't worry too much about it. I think you did a fantastic job with the clothes and the light and the dark in the shadows. You have great technique and it's very original. It makes me thing of brothers grimm and how although most people connect their stories with children stories, their stories are actually much darker. This piece is original and it has a story to tell. I hope you keep practicing and putting effort in it because you show great potential ^~^