Ne Bis In Idem by PriscaMachado is amazing. It's still a WIP and updates pretty slowly, but it's incredibly well written. Synopsis is "The one in which the ‘world on fire’ slips from his grasp, and all that is left is the oblivion of darkness, silence and scattered thought." and it is every bit as intense as that implies. Read it, it's amazing and not getting anywhere near the comments and kudos that it deserves! (I'm hoping that getting more will lead to faster updates!!)


http://archiveofourown.org/works/4128457/chapters/9307462