Yuma, Kingdom of the End

{t}: Add {b} to your mana pool.
{t}: Add {b}{b} to your mana pool if you control
one more Kingdom Land.
{t}: Add {b}{b}{b} to your mana pool if you control two or more Kingdom Lands.
As long as you control two or more Kingdom Lands, Yuma, Kingdom of the End is a 6/6 black creature with deathtouch in addition to its other card types.