Black God Magnus was a magazine campaign item in Japan. I will quote info from LuckyDrawTransformers.com, run by the guys that do Transformers @ The Moon. Courtesy to them and for the pics - they may be the only ones in existence, check them out for the full galleries.
The Lucky Draw Black God Magnus toy is an exceptionally rare find, and is very hard to track down. The toys actual existence is often speculated, mainly due to the lack of images, and that the draw seemed to slip under the radar of many fans. However, images of the item do exist, as do images and copies of the magazine in which Black God Magnus was a prize. You can find all of those images within this gallery, and if we find any others, you can be sure that we will let you know. The only recorded public sale for Black God Magnus was on Yahoo Japan in 2006.