Rainbow Dash (c)Hasbro
Rainbow Factory (c)Owners
Cleaner version here: [link]
Here's a preview of the cover for Rainbow Factory.
I don't feel this needs a mature filter seeing as the blood isn't horribly detailed or anything..if anyone has an issue with it, I apologize, but I just don't think it needs one. The theme of the drawing isn't dark enough for me to think it needs one.
Also note--most of it's just shading. xD