Molten Earthshaker

Whenever a land enters the battlefield under
your control, Molten Earthshaker deals 1 damage
to each creature your opponents control.
At the beginning of your upkeep, if you control
seven or more lands, sacrifice Molten
Earthshaker and it deals damage equal to the
number of lands you control to each opponent.
"The earth trembles at its fiery footsteps, and the skies shudder at its blazing roar."