If either of these are not at fault, more info needed
If mirage generated yogg then no tentacles he creates may be unplayable
If mirage generates a card that says “excavate” all cards including the legendary reward may be unplayable
until resolved the best bet is to play with it in mind to not directly lose you the game on the spot expecting them to work
If Mirage or Narain made dorian all 1 costs may be unplayable(wild may have more cards then the 2 listed with this same issue but it is less on their radar so harder to find bugs/fixes)