Now all I want to know, is how to get it!
Based on a Battle of Chaos presale listing on Amazon Japan, each booster box will contain a coupon for a campaign to receive an Ultra Rare Dark Magician “Special Illustration version”.
Based on the original illustration of Dark Magician from the manga, there will be a sweepstake in Japan where 2,500 winners in Japan will win a copy of this Dark Magician! There are currently no details available for if there will be a similar campaign for this in Asia.
Source from Yu-Gi-Oh.jp