Reader Christopher Cayco is responsible for this incredible League of Legends artwork, which manages to cram every single Champion (up to Taliyah) into the one image.
Chris did something last year, with his 721-Pokemon-in-one-pic. He recorded himself drawing it, so you can see how it was done here. You can also buy prints of the image here.
Below is a large version of the art so you can check out the detail on it (hit the magnifying glass icon to expans).