Corgar, Shaken Mountain

Landfall - Whenever a land enters the battlefield under your control, you may add one mana of any color to your mana pool
Whenever a land is put into your graveyard from anywhere, instead exile it with two quake counters. At the beginning of your upkeep, remove one quake counter from each land you control in exile. Then if no quake counters remain on that land, return it to the battlefiel