The Fall of Eden

At the beginning of your upkeep, each player sacrifices a creature. If you sacrifice a creature
with power 4 or greater, draw a card. If you s
acrifice a creature with toughness 4 or greater,
gain 4 life.
Whenever a creature dies, put a sin counter on
The Fall of Eden. Then if there are ten or more
sin counters on it, sacrifice it and each player
loses half their life, rounded up.