Wastefields of the Xyggra

Wastefields of the Xyggra enters the battlefield
tapped, unless you sacrifice a non-token Xyggra
creature.
{t}: add {b}{c}
{3}{b}: Create a 3/1 Xyggra creature token with
the color of your choice and has shroud onto the battlefield. If you control four or more Xyggra creature tokens, exile Wastefields of the Xyggra.