The Voice in the Darkness

Fear, wither, protection from white
Darkness Encroaches— At the beginning of each
player's upkeep, that player may sacrifice a
creature and lose two life, if they don't they gain
an entropy counter.
Whenever The Voice in the Darkness attacks,
each player sacrifices a permanent for each
entropy counter they have.
"The Darkness is a gift. Let my will set you free."