, Sacrifice Blockbuster: Blockbuster deals 3 damage to each tapped creature and each player.
Destroy target land you control and target land you don't control.
Destroy all lands.
Combust can't be countered by spells or abilities.
Combust deals 5 damage to target white or blue creature. The damage can't be prevented.
As an additional cost to cast Spontaneous Combustion, sacrifice a creature.
Spontaneous Combustion deals 3 damage to each creature.