Darkness, Dragons, and Doom

When Darkness, Dragons, and Doom enters the
battlefield, destroy target permanent.
At the beginning of your upkeep, you lose 4 life,
and target land you control becomes a swamp as
long as Darkness, Dragons, and Doom is on the
battlefield.
At the beginning of combat, you may sacrifice an
artifact, creature, or land. If you do, create either
a 5/5 red dragon with flying and haste or a 4/4
black devil with flying and menace.