Demonic Maistre

As Demonic Maistre enters the battlefield, each opponent discards a card at random, then sacrifice it unless you pay 7 life.
You may look at the top card of your library at any time. If it's a nonland card, you may reveal it. If you do, each opponent gains 2 life and you draw a card.
"The pact with a demon is signed in blood, and upheld in pain"