Nightmare laughed his ass off, all of what Vanguard had seen was just a delusion in his pathetic, fragile mind, and while Vanguard wasted his time attacking a delusion of him, Nightmare had enough time to bring forth the invincible (Period.) Mech of ultimate mass destruction, capable of destroying entire universes in a fraction of a second, nothing else than The Final Creation.
Nightmare watched from the cockpit of TFC at what would soon be his next prey, yep, another easy battle, then again, every single battle in the universe is easy when you're the Illuminati Supreme Commander.
Nightmare then begins checking TFC's 55000000 shiny, colored buttons, designed so if anyone not belonging to the Illuminati pressed them, they would immediatly spray said individual with an acid capable of breaking the laws of physics and melt him to death.
Of course, if one of the Illuminati members pressed any of them, not only would the button proceed with it's function, but release some fancy pyrotechnics for extra eye-candy.
Nightmare deploys some Grand Cannons, Prism Towers, and Tesla Coils (surprised?), And levels the entire area for the hell of intimidation, while still leaving Vanguard alive.
CJMErl is then sucked into a vacuum, ala Ghostbusters, And then covered in Krazy glue (A prison that not even a ghost, spirit, or whatever can escape). He is then shattered with a hammer. And no, you can't avoid being sucked in, it's a friggin Ghostbuster Vaccum. I stole it from Luigi's mansion and fed it Doritos, giving it the power to suck you up regardless of what plane/reality/dimension you're on.
Nightmare then goes on and presses the "Giant Prey button", Turning Vanguard the size of TFC. NMX then deploys all of his tiny laser-slicing jet fighters, which cut him into large chunks of meat. Then, using a nuclear holocaust, All the pieces are sent flying and land in some interstate highway 5000 miles away.