Infinite Life Drain

Play with your hand revealed. If you would draw a card, reveal the top card of your library instead. If it's a creature card, put it into your graveyard. Otherwise, draw a card. Whenever a creature is put into your graveyard from the battlefield, return it to your hand.

: Add . If this ability has been activated four or more times this turn, sacrifice this creature at the beginning of the next end step.

Sacrifice a creature: Add .

Sacrifice this creature: Target player loses 1 life and you gain 1 life.