The Living machine Ship "Sovereign" from MASS EFFECT
The only Reaper to be witnessed by any living intelligent being after the Protheans became extinct, was designated Sovereign. It was a colossal dreadnought, several times the size of any known vessel – even dwarfing the massive asari flagship, Destiny Ascension. At first, it was presumed to be the flagship of the rogue Spectre agent, Saren Arterius, by those who encountered it. Sovereign did act as transport for Saren and his geth minions – however, it was later discovered by Commander Shepard that it was in fact Sovereign who was truly the mastermind behind the genocide. Saren began his search for Sovereign at the end of . At first, it was presumed to be the flagship of the rogue Spectre agent, Saren Arterius, by those who encountered it. Sovereign did act as transport for Saren and his geth minions – however, it was later discovered by Commander ShepardMass Effect: Revelation using research stolen from Dr. Shu Qian, eventually finding the Reaper near or within the Perseus Veil.