These Stones, Their Fate

E/O Challenge: Stone. 3 x 200/250 word drabbles that seal the Winchester's fate. 1#: Dean doesn't see what Sam and Castiel find so horrifying. 2#: Sam turns to desperate measures to stop the unstoppable. 3#: They're where everyone said they belonged. Set in my dark idea for season 10. Spoilers for season 9 finale!