Luxor was, at birth, a black dragon.  This was literally centuries before the advent of an official Silver Sept, though I imagine there would still be dragons fitting such a description (healers) even as far back as that.  As should be obvious, I took some liberties with the mystical nature of dragons and decided that radical changes in mindset could alter the body at a physical level as well.  This led to Luxor's current silver sheen, and Menga's acidic disposition.<br/><br/>The man known as Luxor is only known by a scarce few individuals to be a dragon, mainly only including Menga and a select few individuals he decided to keep at his side.  His involvement in dragon affairs has been extraordinarily limited since his companion's betrayal, meaning that his major focus has been on the forces of humanity for the past few centuries.  The advent of Luxitone is meant to signify the start of a major social upheaval on a global scale, so it stands to reason that Tann Rinn and Luxor would come into conflict even if she wasn't aware of his true nature.  A freely distributed drug with no negative side effects that cures injury and makes people happy?  Hardly the sort of product conducive to ensuring that humans continue to slaughter each other in droves!<br/><br/>I'm well aware how tricky my proposition is, but I believe it's the best way for me to stay directly involved with the Black Dragon plot.  Luxor is very much a behind-the-scenes figure, which makes constant participation in this sort of roleplay rather difficult.  Menga is meant to solve that problem, being much more accessible to a wider range of individuals.