Orzhov Ascendancy

At the beginning of each upkeep, you may sacrifice a Treasure. If you do, put a charge counter on Orzhov Ascendancy.
Whenever a creature you don't control dies,
if Orzhov Ascendancy has six or more charge counters on it, create a 1/1 white Spirit creature token with flying and a 2/2 black Zombie creature token.