Ogremoch, Lord of Stone

Trample, Indestructible, Menace
Spells you cast cost {b}{b}{g}{g} less to cast. This
effect reduces only the amount of colored mana
you pay.
Whenever Ogremoch, Lord of Stone deals
damage to a player, you may destroy target land
they control. Tap all lands defending player
controls and they don't untap during player's
next untap step.