Jacob, The Lonely

Jacob, The Lonely's power is equal to the number
of creatures in your graveyard
minus the number of creatures you control
{t}{x}{x}{u}{u} You may sacrifice up to X creatures
from your battlefield.
If this causes Jacob, the Lonely
to be the last remaining creature, transform it

Jacob yearned for solitude, but when he
achieved it, found it not to his liking.