I originally drew that Shadow to test out a Photoshop + Medibang workflow, but since I liked how it turned out I decided to make it some kind of wallpaper :D

If you look closely, you'll notice his eyes are different in the second image.
I thought it would look interesting if his eyes changed color when using Chaos Powers / tapping into his Chaos Energy, kinda like how Sonic's eyes change color when going Super

Oh, and the lyrics are there because I thought it looked cool (?)

Shadow belongs to SEGA/Sonic Team