Sandtrap Spider

Sandtrap Spider has flash while in exile.
Foretell or Morph {2}{w/b}{r/g} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
When Sandtrap Spider is turned face up, exile target attacking creature without flying.
Pay Sandtrap Spider's foretell cost: Turn it face down and put a reach counter on it.