Kaldrog, the ruiner

You may play Kaldrog as a land, if you do he
enters the battlefield tapped and has: "Whenever
a landfall effect trigger, trigger that
effect twice instead."
{t}: add {g} or {r}.
If you play Kaldrog from your hand as a creature
it gains: "When Kaldrog enters the battlefield,
you may play an addition land this turn."