Minor Artifact
Ghoul Stones.
This irregularly shaped, mottled grey green stone, about the size of a skull looks subtly out of place wherever it rests, nothing you can put your finger on though.
When inert, the stone projects feelings of nagging hunger out to 150 feet to anyone who is a mundane. Arcane spellcasters (on an appropriate skill check, ie spellcraft or Knowledge [Arcana]) can tell that there is something unnatural occurring, but can not tell what it might be. They still experience a nagging hunger. Divine Spellcasters definitely feel something wrong and malevolent about the feelings of hunger. No one can pinpoint where these feelings emanate from.
When activated (either unwittingly or with intent) and left unattended, the feelings of hunger become almost maddening, and anyone within 100 feet must succeed at a Will saving throw (determine your own DC) every minute or give into the hunger, looking for any source of food available (including livestock and people.)
If held by the activator, anyone slain within a vicinity of 50 feet whilst under the influence of the Hunger aura rises again in 1d4 rounds as a ghoul, under the control of an awakened Ghoul Stone (determine appropriate intelligence level). At this point the wielder of the stone must contend with the stone's Ego or become its slave.
If the wielder succeeds, he gets control of the stone and hence any ghouls, and the Paralyse ability.