Malthael, The Eternal

Whenever Malthael, The Eternal Enters
The Battlefield From Anywhere,
Annihilator 20 (Target Opponent Sacrifices 20 Permeants) And Destroy That Many Creatures Or If There Aren't Any Opponent Creatures Then Target Mills
That Many Permanents Instead.
{t}{2}{r}{b} Malthael Deals Twice His
Damage.