Amulet of the Horde Lord

A small and simple amulet made out of silver and bone.  The amulet is shaped in a small skull and gives off a strong necromantic aura.  The amulet allows for the attuned wearer to maintain control of  undead created by the spells Animate Dead or Create Undead for one week, 168 hours, before having to recast the spell.

Notes: An evil cleric or paladin