Lentora, Unholy Pope

Lifelink, Deathtouch, Eternal 4
Whenever a creature you control dies,
gain life equal to its toughness, then create
2 1/1 bird spirit creature tokens.
{3} :Pay X life, :return target creature of
power Xor less from your graveyard to the
battlefield and put the top X cards of your
library into your graveyard.
If you have no cards in your
library, you win the game.