Desolate Blood Fields

When you planeswalk to Desolate Blood Fields,
or at the beginning of your upkeep, put a 1/1 colorless Scion creature token onto the battlefield. It has "Sacrifice this creature: Add {1} to your mana pool". Then you lose 1 life.
{c}: Until you planeswalk away from Desolate Blood Fields, lands target player controls produce only {c}.