Thread:Ain Soph Aur/@comment-5306586-20120912072945/@comment-3317930-20120912080639

There have been two instances where it was present - when Madara possessed it prior to his 'death' (which had a brown tint), and Obito with a purple-tinted one (despite claiming that it originally belonged to Madara); if the tool itself has no unique traits of its own apart from being usable as a medium for ambiguous techniques, then it can't necessarily be considered a 'unique' item, and hence unqualified for listing.