When I was looking to buy pieces for a custom Onitama set I made, I discovered the universe of "fairy chess pieces," or non-standard pieces with different moves or powers. The classic one is the Amazon, which is a combination Queen and Knight (hard to google "amazon chess piece," of course...), but there's also the Empress, the Elephant, the Camel... With easier access to 3D printing, there's now a whole world of these.