Arcane Hourglass

the Arcane Hourglass is an interesting series of four bulbs of glass with sand mystically flowing continually through each.

The party encountered this item in the tunnels beneath the wizard's tower in the Deadwood in their quest to recover said artifact for Dr. Nezznar

The hourglass was protected by a hoard of zombies as well as a zombie ogre, and indeed seemed to be re-animating the dead somehow.