Yeah, we had that issue with Rokugan and Oriental Adventures and the shadow taint.I immediatelly had flashback to 3.5 taint. You do not want anyone to see your taint, as you never know how people may react to being shown your taint, so you may waynt to conceal your taint....

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.