Yelad, The Lord of Blackmail

At the beginning of each opponent's end step, if
that player doesn't control a Blackmail token,
that player creates a colorless artifact token
named Blackmail with shroud and
"{t}, sacrifice Blackmail: you lose 7 life. "
If a spell or ability you control would cause an opponent to choose a card, you choose those
cards instead as long as that opponent controls a Blackmail token