The Mass Effect 3 DLC known as "Leviathan," which was first revealed in data from the "Extended Cut" DLC, then leaked again when a voice actor revealed his role in it, and finally confirmed earlier this month, has now received a proper trailer at last. Here's the official plot synopsis:

"Something lurks in the dark corners of space, something powerful enough to kill a Reaper. Shepard must discover the most closely guarded secret in the galaxy before the Reapers silence it forever. Discover more about the origins of the Reapers as you race across the galaxy to find the Leviathan. Unravel the dark history of the Reaper Race before it is too late."

"Explore uncharted systems and new areas on the Citadel, interact with brand new characters, unlock the AT-12 Raider shotgun and M-55 Argus Assault Rifle and discover more about the mysterious history of the Reapers."

The DLC drops for $10 or 800 Microsoft Points on August 28. Does it sound like a worthy addition to the ME 3 story? Let us know what you think in the comments or on Twitter.