She Who Betrays

She Who Betrays enters the battlefield under
target opponent's control.
Once each turn, She Who Betrays' owner may
pay {b}{b}, if he or she does, She Who Betrays
controller loses 4 lives and discards a card.
At the end of She Who Betrays' controller's turn, target player except it's owner gains control of it
unless he or she pays 3 lives.