This sword was forged in the ancient past at the request of a soldier who had to destroy an evil magician who had gained immortality.
The weapon to all appearences will appear to be a +5 sword until in battle when a qualified person swings the suddenly heavily unbalanced sword.
Plain looking dagger. However, when the dagger is seen in the light of an open flame Jamil’s hand print is on the hilt from where he gripped it in his death.
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.