Dreadhorde Apocalypse

When Dreadhorde Apocalypse enters the battlefield, put three demise counters on it, then choose a permanent you control of each
permanent type and sacrifice the rest.
At the beginning of your upkeep, remove a
demise counter. When Dreadhorde Apocalypse
has no demise counters on it, it deals 20 damage
to each opponent.
Then exile Dreadhorde Apocalypse.