Skemfar Croakhall

Skemfar Croakhall enters the battlefield tapped.
{t}: Add {g}.
{2}{b}{b}{g}, {t}, Sacrifice Skemfar Croakhall: Up to
one target creature you don't control gets -2/-2
until end of turn. Create two 1/1 Green Frog
creature tokens. Activate this ability only any
time you could cast a sorcery.