Jing, Deity of Mt. Qin Gu

When Jing, Deity of Mt. Qin Gu enters the battlefield, you can choose to sacrifice a creature.
If you do so, this creature gains flying.
Retrace (You may cast this card from your
graveyard by discarding a land card as an additional
cost to cast it.)
{6}{b}{b}: Create a 3/2 central ancient creature
token with flying and put it into the
battlefield tapped.