Mass Effect 3 → Commander John/Jane Shepard
-I couldn’t do this without you, Garrus.
-Sure you could. Not as stylishly, of course.
It is unknown who initially began the development of the Crucible. Countless different species obtained and made contributions to the design over the course of millions of years, but none successfully deployed it before being wiped out by the Reapers. The latest species to try, the Protheans, were able to construct the Crucible, but before they could deploy it, infighting broke out between those who wanted to use it to destroy the Reapers and a faction that believed they could use it to control the Reapers; these separatists were later discovered to be indoctrinated. While the Protheans never had the chance to activate the Crucible, its schematics survived in a Prothean archive on Mars for the next 50,000 years.