Ohkur, The Corrupted

When you cast this spell, choose a land of each
basic land type, then destroy those lands.
Ohkur, The Corrupted enters the battlefield
with a +1/+1 counter on it for each land
destroyed this turn.
Whenever a land is put into a graveyard from the battlefield put a +1/+1 counter on Ohkur, The Corrupted.