Rebel Mineshaft

Shock -- Unless a creature you control dealt combat damage and was played this turn, Rebel Mineshaft enters the battlefield tapped.
{t}: Add {b} or {r} to your mana pool. The next creature spell you cast this turn has dash.
Its dash cost is equal to its mana cost.
{t}: Add {u} or {b} to your mana pool. The next creature spell you cast this turn has flash.