r-o-o-k-i-e

An AU where Humanity discovers a crystalline supermaterial that stores insane amounts of energy and their technology radically diverges as a result. By the time the Citadel Races encounter them, humans are a much scarier proposition than in canon. Though not to the point of being completely OP. Sae Shepard, a Special forces Siren, is going to have one hell of an impact on history!