Cropshund

Goldbrick (You may pay {0} instead of paying any or all of the colored mana costs of this spell. If you do, the next spell you cast costs that much more, and until then, you can't cast spells using alternative costs.)
You may play an additional land this turn if Cropshund entered the battlefield this turn and you didn't pay mana to cast it.
{u}{b}{r}{g}: Cropshund becomes a Forest in addition to its other types.