While the source button leads to my DeviantArt posting of the same picture Here is the original artist’s DeviantArt and Here is where you’ll find his works on this site.
 
I am not good at sketches, so I’ve used Prism’s piece to trace. All of the final lines are done by me.  
Original Sketch
 
This is my first hand drawn on a tablet piece. I’ve had the tablet for well over 2 years, but had given up its usefulness over vector work.
 
I’ve had a bit more practice drawing, but 90% of the time my sketches aren’t worth much. Decided to try hand drawn this time because it would be easier to realistically shade.