Stones Thrown Before the Tide

In the race to fire the Crucible, Urdnot Wrex arrives on the Citadel with Shepard instead of Anderson. When he hears the Catalyst's options, he's determined to leave only one choice: destroy the Reapers. Rippling backwards 300 yrs, his actions send himself and three others on a journey that'll do far more than change history, it may destroy everything. Cussing, violence, sex. CD/AU