All right, I'll do a summary of the three posts following yours:
Joshua Tamashii (the player)'s Post: His character, Jack (Who's a girl) basically covered the entire convention floor in mist, then turned part of said mist to chains that bound everyone except Eise/Black Cat, Ascot, and Ken Saddler (NPC, one of the game developers, and ally). She then taunted everyone, especially Silas (whose mother she killed), before going to the unused third of the convention center and killing all the ArcU troops there, and taking the 'control booth' for the Mechanical Spider that was attacking the place. She then lifts the mist so that she can see everyone fight for her own amusement.
Mass City's Post: The NYPD arrives and finds everyone frozen because of a time stop; they are unable to find the Magi.
My Post: Basically, it's divided into three parts, see below.
Catherine and Thaz - Catherine is buried under a swarm of spirit creatures summoned by Omega, allowing Thaz to talk to Elizabeth Cortes (NPC, one of the game developers, and ally). Elizabeth confirms the fact that Akira Kariya (the main villain, and the maker of the SAO-ripoff) is batshit crazy, and Thaz decides to pursue him.
A Few Seconds Later - Then, Thaz is trapped by the mist, and spends her time railing against Jack, while complaining about how Heinz is hiring thugs and criminals into the Agency. When the mist fades, Thaz pursues Akira Kariya, now revealed to be the villain, and the two fight, with Akira using hardlight hologram clones filled with explosive energy, then invisibility, then a special gun that produces sounds that keep Magi from concentrating, and finally, bolts of silver light that deal damage to Magi that cannot be healed by magic.
A Few Seconds Later, Ascot - Ascot's scared, but keeps himself calm, and once the mist fades, he attacks Eise with a special Magitech sword that's as sharp as the latter's claws, while using Eskrimador and Acrobat skills to basically match his opponent in speed.
Then, the Mechanical Spider dissolved into motes of metal and faded away.