What the ghouls could smell and ADVENT had detected in the last second would finally emerge under the form of a massive pod bursting through the center of the peace shrine. As it would then expose its contents, acid would be sprayed all over the area in an attempt to soak the attendees. Tatara would already have his white coat lowered to his waist, exposing his upper body. A red tentacle-like Kagune resembling an absurdly long tongue would swiftly emerge and shield the Outliners targeted. The acid would burn the Kagune somewhat, though it seemed the burnt portions would be severed off instantly by a second Kagune of exactly the same shape; the appendage would simply whip the other and slice the portions off.
"Oswald, we're leaving."
Ordered a more stern and solemn Eto as she'd stand and turn to follow the Speaker and elder Quincy who were already making their way toward the exit. At this point, Tatara's Kagune would rapidly wrap around him and breakdown into a foul and monstrous armor that spared no part of his body. While still humanoid, only his mask would remain out of the whole metamorphosis, leaving only the body of a completely turned monstrosity exhaling loudly with constant flames burst out of his 'mouth'. Multiple of these tyranid creatures would of course aim for the Outliners and especially the flashy one of the gang. The morphed ghoul would easily obliterate the minions charging at him with the masses formed under his arms while his Kakuja armor easily tanked their assault.
Evidently these creatures could pierce ghoul flesh, but a Kakuja was definitely another story.
Flames would suddenly be released out of the Kakuja's entire visage, not just his mouth, and engulf the entire center of the meeting kiosk with searing flames going over 4000 degrees Celsius. Inevitably the Tyranids caught in the the flames would have little to no chance at doing anything about it. Tatara would slowly back up as the whole floating meeting spot would quickly catch on fire as the RC cells that ignited the fire would spread on even the most resilient of fabrics and start cooking the foundations.
Meanwhile, Eto and her two lackeys were speed walking their way out with Tatara covering their retreat. They would be surprised when a few of these critters would emerge from difficult to access areas and assault them before they could reach their UFO transport ship. Eto would be swift to react and defend the Speaker at all cost with her Ukaku Kagune launching large spears of RC cells at the speed of bullets at the assailants. The Elder quincy would also be quick and draw a Reishi-created blade and cut down a couple. Little did he know that a smaller one of the minion Tyranids would have been able to exploit an opening and scratch his ankle.
Eto would of course witness it and quickly impale the menacing creature with her Kagune projectile, killing it off quickly. The older quincy would look up at her fear in his eyes.
"Oh no, Terry! What are we going to do?! ..."
She seemed distressed, even saddened that her colleague had been struck by what the Imperium representative had announced was fatal and a massive risk if kept alive. The man would look at his wound, just as distressed before looking back at his superior.
"Eto, I think I- ..."
The ghoul's more monstrous Kagune would have lunged and impaled the man's entire abdomen, cutting him off instantly.
"I forgot my lighter than none of you smoke so ... Guess it's stomach city for you!~"
The Speaker seemed indifferent as he'd only glance at the scene before rushing into the UFO. The older quincy would widen his eyes at Eto's display of cruelty and jolly reaction to his inevitable fate. Her Kagune would rise before catapulting the impaled man over Tatara. The timing was just right, as the Kakuja spewed a new wall of flames, blasting to ashes the Quincy in the process. Kagune new retracted, Eto cough as she noticed Tatara's flames filling the area with noxious fumes.
The Head Executive would make her way to safety within the UFO ship that hadn't been invaded yet while waiting for Oswald and Tatara. With her around there was little chance of a breach if they were to hurry.
Meanwhile ...
The Temple Ship they had brought over for the Envisioning One's luxury was under heavy fire. Many of the pods would attempt to pierce through, though the many layers of alloys used by ADVENT would prove to make the task difficult. By then the Tyranids would have the misfortune of having the Outliners' leader within the ship, an entity said to be able to confront the other two grand leaders. Whether it was true or not was a mystery, but it was an accepted truth that they wielded exceptional power.
With radars and maintenance systems alerting of an imminent breach, the entity that had be teleported back to the ship thanks to the Avatars would simply sit on their previous seat, overlooking the panicked crew. While a simply gesture of their hand, a massive power spike would have been detected by every organization with eyes on Arcadia, and the Tyranids' hivemind would also sense it. A danger that had awoken as they rattled the wasp hive.
A massive explosion of repulsive gravitation force would effortlessly push back all the beings outside of the ship, ejecting them hundreds of miles backwards. The smaller beings out of their pods would be completely rendered to mush with the force alone. The ship was Tyranid-free for a moment, allowing them to raise an energy barrier to safely push any returning force long enough for the Temple Ship to vanish back into the massive portal it previously emerged from.
The shock of the gravity blast would have been felt all around the world, provoking seismic reactions to the nearby continents while rogue Tsunamis would hit the closest coastlines for a good hour. The burning negotiation area would be somewhat shaken, but otherwise spared from anything of consequence.