"... Eeep.." Artoria said as she scuttled a bit backwards. "Yeah! It's totally ready now, yep, I'm off." Artoria's statement was not very reassuring.

Tearing open the fabric of space, Bunny Ears, Fox Tails, Pangolin Claws, and Magpie Wings at the ready, she flashed into the room next to the room with the Gamma suit. With Hibiki distracted by fighting, she wouldn't likely notice Artoria in time, as she both wasn't in the room with the Gamma suit, and rather than try to disengage the security mechanisms, try to wear the suit, or any of that, Artoria simply sucked Gamma and that entire wall between the two rooms into her Gates of Tartarus in a fraction of a second. And once inside the Gates of Tartarus, which had a stasis effect and a dimensional barrier, it would likely be protected it from Hibiki's explosives. Now, the suit was still rigged with explosives (even if prevented from exploding while within the Gates of Tartarus), so Artoria couldn't use it, but neither could anyone else unless they could reach into Artoria's Gates of Tartarus. @Ryonara

Then, she teleported to the reactor room, which was no doubt heavily guarded. It was not exactly heavily guarded against "Deluge of Supercharged hell lava", as it seemed all of the Machina heavy hitters were fighting on the factory floor or outside. Artoria surrounded herself with outward facing gates, sending hundreds of tons of superheated demonic lava with evil Valkyrie fire everywhere. By gathering up demonic lava that was already tainted, then charging it further with Ira's Black Flame and Mephila's pyrokinesis, then storing it in the stasis of Gates of Tartarus, Artoria had a rather potent combined charge up attack that she could store up massive quantities of. She had been doing this, poking her wingtips and tailtips through portals, while lounging in the throne room.

Her goal was to wash away all resistance, and all controls by which the Machina could interfere with the next part of her plan, as well as set a trap for any who would come and try to stop her next, what with the room being a sea of evil lava. Now, all that was left to do was to send demonic energy straight into the reactor to attempt to corrupt the entire facility at once. Unfortunately, this probably meant Artoria was going to be in a direct contest of power with Eos which was something she really didn't know whether she could do. She had wanted to charge up a lot more demonic energy, but... Waiting around next to Lucille seemed like a terrible plan. So, with Ira's wings upon her back, she placed her hand upon the reactor, and gave it everything she got.