Horror from the Hills

Put two counters on this card. At the beginning
of your upkeep remove a counter.
{0}: This card becomes a 2/2 black creature with
shadow and, "Tap: Lose 6 life and sacrifice this creature to create Horror, a 3/3 colorless token
spirit creature with "At the beginning and end of
every turn each opponent loses 1 life"." Use this ability only if there are no counters on this card.