Deepwater Horizon

This land enters tapped.
You may choose not to untap this land during your untap step.
At the beginning of your upkeep, if this land is tapped, put an oil counter on it.
{t}, Remove any number of oil counters from this land:
Add {b} for each oil counter removed this way.
{2}{r}, {t}, Sacrifice Deepwater Horizon: Destroy each nonland permanent with mana value equal to the number
of oil counters on this land.