It's the Music Meisteeerrrr! From Batman the Brave and the Bold. I simply love this episode. I mean, c'mon! It's Neil Patrick Harris as a singing villain (Hmmm, Dr.Horrible, anyone?)! This wasn't intended to have any likeness to Soul Eater. Personally, I've never seen it, but a girl that saw this drawing thought it was from Soul Eater at first, sooo, yeah.