what happens if you roll outside of the range?

If you have something like [[night shift of the living dead]] as you resolve a [[druid of the emerald grove]], roll a 20 and use night shift to make it 21?

Do i just get too look at my library? Does your library have to be in the same order before and after you search?

On a similar note, if i roll a 6 while rolling for attractions, and my opponents play [[scooch]] to make it a 7, does all my attractions fail to trigger?