Thermonuclear Bomb

{t}, Sacrifice this card: Destroy all permanents.
{t}, Sacrifice this card: Deal 20 damage to each
player.
{t}, Sacrifice this card: Exile the top 20 cards
of each players library.
{t}, Sacrifice this card: Each player discards
their hand and exiles their graveyard.
"Now I have become Death, destroyer of
worlds....And I'm fine with that...."