Necrotic Anomaly

At the beginning of your upkeep starting on your second turn, if Necrotic Anomaly is in your command zone or on the battlefield, sacrifice a creature other than Necrotic Anomaly, then draw a card for each creature card in your graveyard. If you can't, you lose the game.
Creature tokens stay in graveyards.
Necrotic Anomaly's power and toughness are equal to the number of creature cards in all graveyard..