This is indeed a very treacherous and evil item, It can be used every (See below) to bring death to all within it's radius of use which is around 5 tiles. Anything inside this area will be precariously close to death if unable to evade. Including the user of the orb.
The Orb of Doom was used twice within 5 minutes (closer to a 60 second timer) in Early April 2012 on the Elevation Server of the Epic cluster during a battle in which The Mongol Empire killed (approximately) 44 players from all other kingdoms.
This artifact has been revealed by Jotz 7-15-2009