Borderland Cenotaph

Foretell or Morph {3}
Whenever Borderland Cenotaph enters the battlefield or is turned face up, choose a color.
Whenever a nonland card that is four or more colors enters a graveyard from anywhere, exile it.
Whenever Borderland Cenotaph dies, put all cards exiled with it that are not the chosen color on the stack under their owners' control.