Worlddoom, Volcanic Spire

Worlddoom enters the battlefield with four sleep counters on it.
At the beginning of your precombat main phase, remove a sleep counter from Worlddoom and
add {r}. Worlddoom deals 1 damage to a target
chosen at random. Then if there are no sleep
counters on Worlddoom, sacrifice it and it deals
4 damage to each creature, player, and
planeswalker.