Maldaur, The Demon King

Maldaur can't be countered
Annihilator 5, First Strike, Flying, Indestructible, Intimidate
When Maldaur, The Demon King enters the battlefield, deal X damage divided as you choose, where X is the total converted mana cost of cards in graveyards.
Whenever Maldaur, The Demon King attacks, it deals damage equal to the number of creatures on the battlefield to the defending player
{1}{b}{r}: Deal 3 damage to each creature