My friends and I made a full custom cube with cards designed around Marvel, DC, Star Trek, Star Wars and some other random nerd properties. Drafting that is probably the most fun any of us can possibly have with the game of Magic.
Thought about posting it here at some point, but all the art is stolen off of Google searches and I wasn't sure how people would feel about that.
All custom card sets do that. Even if you don't give credit to the artists, I think it will be fine if they're easy to find with Google searches.
Design article by Ethan Fleischer
About the cards, I'm kind of surprised they're using the unblockable part of protection after all. Chromium is a neat design.
There's also an artifact horse
Richard Garfield designed for Dominaria a cycle of "lucky charm" artifact creatures that gain you life when you cast a spell of a certain color, which got consolidated into this creature. The art for this was controversial, with some in Wizards thinking it's too rainbowy, I suppose.
The article also has the tidbit that in Japanese, Vaevictis Asmadi was translated as though Vaevictis was a title on the old card, so they had to make sure the new card's name could be translated the same way.