Tenurach, Lord of Darkness

Flying, trample, indestructible
At the beginning of your upkeep, sacrifice a
Human. If you can't, Tenurach, Lord of Darkness deals 7 damage to you.
Whenever a Human you control is sacrificed this way, you may pay 2 life. If you do, exile it instead and put a 5/5 black Demon creature token with flying onto the battlefield.