Mount Imperitan

(Mount Imperitan enters the battlefield tapped.)
{t}: Add {r} to your mana pool.
{r}: Sacrifice a Mountain: Put a lava counter on
Mount Imperitan.
At the beginning of your upkeep, if Mount
Imperitan has five or more lava counters on it,
sacrifice it. If you do, it deals X damage to each
creature without flying and each planeswalker,
where X is the number of lava counters on
Mount Imperitan.