There is a realm of existence so far beyond your own, you cannot even imagine it. I am beyond your comprehension. I am Sovereign.
~ Sovereign introducing itself to Commander Shepard.
We impose order on the chaos of organic evolution. You exist because we allow it - and you will end because we demand it.
~ Sovereign.

Sovereign, known as Nazara by the Geth, is the main antagonist of Mass Effect, and the overarching antagonist of Mass Effect: Revelation.

It is voiced by Peter Jessop, who also voiced Tharok in Justice League vs. the Fatal Five.


Sovereign is a member of an ancient race of sentient starships called the Reapers, who assimilate all advanced organic life in the galaxy every 50,000 years. Worshipped as a god by the Geth Heretics (which it finds insulting, yet allows to continue to use the Geth as tools) It indoctrinates Saren Arterius and Matriarch Benezia, using them to find "The Conduit", a proto Mass Relay developed by the Protheans which directly accesses the Citadel. The Citadel is in fact an enormous Mass Relay which the Reapers use to enter the Galaxy from dark space, which the Protheans sabotaged in an attemot to prevent the Reaper's return. Sovereigns plan is to have Saren use the Conduit to infiltrate the Citadel and activate the Mass Relay, allowing the Reapers to enter the galaxy and begin their mass harvesting of organic life.

Being approximately two kilometres in size, Sovereign is not directly fought as a boss in the game, but is fought indirectly at the end, where it assumes direct control over Saren's corpse during the final battle, right after which it is destroyed by the SSV Normandy and the Alliance fleet while trying to finish activating the Citadel relay.


           Masseffect logo.png Villains

Reapers and Servants
Sovereign | Harbinger | Human-Reaper Larvae | Saren Arterius | Matriarch Benezia | Collector General | Husks | Collectors

Illusive Man | Renegade Commander Shepard | Kai Leng | Oleg Petrovsky | Henry Lawson | Maya Brooks | Gavin Archer

Corrupt Party Members
Jack | Morinth | Zaeed Massani

Villainous Organizations and Species
CAT6 | Geth | The Citadel Council | The Blood Pack | The Blue Suns | The Eclipse | The Archon

Mercenaries and other Criminals
Aria T'Loak | Captain Enyala | Clone | Doctor Saleon | Garm | Golo'Mekk vas Usela | Harkin | Jaroth | Jedore | Ka'hairal Balak | Nassana Dantius | Shadow Broker | Tarak | Tela Vasir | Vido Santiago | Warden Kuril

Other Villains
Admiral Daro'Xen | Admiral Han'Gerrel vas Neema | Clan Chief Weyrloc Guld | Dalatrass Linron | Gatatog Uvenk | Maelon Heplorn | Ronald Taylor | Thorian | Urdnot Wreav

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