Kyrgoz, the Realm-Razer

Flying
Whenever Kyrgoz, the Realm-Razer enters the battlefield, attacks, or becomes monstrous,
destroy target land.
{7}{r}{r}{r}{r}: Monstrosity 4. This ability costs {1} less for each land card a graveyard. (If this
creature isn't monstrous, put four +1/+1 counters on
it and it becomes monstrous.)