All it takes for evil to triumph is for Ennui to convince good men to do nothing.
The leader of the Seven Brave inhabits this arrogant weapon.
The deadliest Sinblade, Wrathbringer is coveted by the violent and feared by all.
A secret MLM (pyramid) company that offers eternal life, but in fact it transfers the life forces of its members to those position "above". If you get high enough, (meaning you get enough new members) you start to enjoy the benefits. Maybe a willing sacrifice is much more effective for the transfer. But no one says, that a suddenly unwilling member, threatening to tell the authorities, may not loose it involuntarily... thus start people to vanish, and aged corpses are deposited somewhere safe.