Rather than pick another of the community supplied robots that come with the EV3 software, I wanted to build a Rubik's Cube solving robot. It just so happens there is a fantastic project already available that creates one from just the 31313 EV3 parts - the MindCub3r created by David Gilday. Awesome :)
The Ender Dragon is a scene from some game called Minecraft. I guess if you're reading this you most likely already know that and probably know way more about the game than me. But essentially it is a game about using different types of bricks to create stuff. Remind you of something?