Wormfoast, Vile Influence

Wormfoast enters the battlefield under the
control of target opponent.
X is the number of creatures you control.
At the beginning of your upkeep, you may pay {x} to put Wormfoast under the control of an
opponent who does not own Wormfoast.
When you begin your combat phase, choose one:
•You lose X life.
•Sacrifice other creatures with total toughness X.