Denethor, Steward of Gondor

When Denethor, Steward of Gondor enters
the battlefield, look at target player's hand.
{t},{b}{b}, pay 1 life, put a despair counter on Denethor, Steward of Gondor: Draw a card.
Then, if there are three or more despair counters on Denethor, Steward of Gondor, sacrifice him.