"What is that..."
The Gray Mist, having come from outside the universe, overpowered Ultraman Reiga.
Its first move immediately captured the attention of the viewers across the infinite multiverse.
"It has no physical form, and its attack methods are uncertain. Its combat style is completely different from those in the Honkai: Star Rail and Ultra universes," Madara Uchiha, already deceased in the Naruto world, thought to himself.
From the very beginning, the light curtain had been emphasizing the danger of the Gray Mist, warning that if it wasn't stopped, both universes would be destroyed.
But to this day, the video had never explained what the Gray Mist truly was.
Does it have consciousness? Is it born of nature or created by man? What is its purpose?
They knew nothing about any of this.
"A single Swarm King has already left the universe battered and bruised. Now we have to add the Gray Mist to that... Is our universe really in that much danger?"
In the world of Ultraman Tiga, at the TPC headquarters, Shinjo let out a deep sigh. Although the Land of Light's universe was completely different from their own... they were undoubtedly part of the same multiverse. Who knew when the Swarm King or the Gray Mist might show up?
Although Ultraman Tiga would surely protect them, still...
Recalling the power of the Swarm King and the Gray Mist, Shinjo couldn't help but feel a sense of despair. It wasn't that they didn't believe in Tiga, but that the enemy's power was simply too terrifying.
The Land of Light had so many Ultras, plus a host of powerful reinforcements, and even then, they had only barely defeated the Swarm King, and still hadn't completely eliminated it.
What qualifications did their Earth have to be compared to the Land of Light?
"Why is the universe always plagued by so many disasters? Darkness, the Swarm King, the Gray Mist, one after another... The Ultra Warriors of the Land of Light... have it way too tough..."
Utaha Kasumigaoka frowned and couldn't help but sigh deeply.
It was no wonder that multiverse was called the Ultra Universe. Besides the Ultras, there was almost nothing else that gave one peace of mind.
---o---
[On the light curtain, after Zero left with Ultraman Reiga, the Gray Mist continued to spread.]
Although Noa and Ultraman King were at the borders of the universe, preventing a large-scale invasion of the Gray Mist, a small portion of it still managed to appear within the cosmos.
The regions of space where it appeared would die out for unknown reasons, and the places it passed through would be left with only nothingness.
"So the old man and Noa went to the borders of the multiverse because of this?" Zero wondered to himself as he watched the Gray Mist annihilate parts of space.
This thing looked quite dangerous, and it was a mass that even Ultraman Reiga was no match for.
"Zero... this thing, it seems... kind of familiar?"
"Stelle, you know where this fog came from?"
Hearing that Stelle might know the origin of the fog, Zero immediately asked her in his mind.
Stelle nodded. She propped up her chin with her hand, closed her eyes, and recalled the moment the Amber King had sent her here.
At that time, she was too busy complaining about the Amber King to pay any attention to her surroundings.
When she landed in the Ultra Universe, it seemed she was accompanied by that same kind of Gray Mist. The moment she landed, the Gray Mist swirled around her like a playful spirit, both strange and elegant.
Not only that, but it was the same during the transit. Although the Amber King was incredibly fast, sending her from the Express to a strange planet in a flash of light, in that brief instant, she still vaguely sensed something.
That strange power was almost identical to the Gray Mist Zero had just encountered.
"Is that so? In other words, two completely different multiverses came into contact because of the Gray Mist?" Cosmos speculated after Stelle told the other Ultras the details of her arrival in the Ultra Universe.
If it was really as Stelle described, then outside the multiverse, the Gray Mist was everywhere, as omnipresent as air.
The possibility of a mastermind could be ruled out. Because whether it was the Ultra Universe or the Honkai: Star Rail universe, it would be nearly impossible to fill the distance between the two multiverses with the Gray Mist.
Let alone an ordinary being, not even an Aeon like IX of The Nihility or a great god like Noa could accomplish such a feat.
How far apart are the two multiverses?
It's no exaggeration to say that if an ordinary Ultra Warrior were to fly, they probably wouldn't even catch a glimpse of the other multiverse in their entire lifetime, let alone reach it.
From this, it was clear that the Gray Mist was most likely a natural phenomenon. And... it was likely trying to drill its way into the universe for some reason.
Cosmos was guessing in his mind when, at that very moment, danger quietly approached.
"Cosmos-senpai, watch out!"
Among the Ultras, Ultraman Reiga, who had fought the Gray Mist the longest, instantly sensed its approach and directly shielded Cosmos.
"..."
There was no sound, no prelude. The moment it made contact with the Gray Mist, Ultraman Reiga's body seemed to have suffered a heavy blow. The rhythm of his timer suddenly quickened, like a dying heart struggling for its last beat.
"Hey, you guys..."
Zero looked at the group, whose situation was clearly not right, and couldn't help but speak up.
But it was obvious that the current Ultraman Reiga no longer had the strength to heal them.
"Now is not the time to hesitate, Zero... Let us borrow the power of Ultraman Saga one more time!!"
Dyna's call rang in his ears, causing Zero to clench his fists and raise the Aegis of Palagye bracelet high.
"Alright! I'll never let them get away with this!"
A seven-colored light flashed, and the legendary Ultra Warrior, the light of miracles, Saga, appeared in the universe once more.
"Swoosh—!"
Ultraman Saga crossed space, putting distance between Ultraman Reiga and the Gray Mist, and transferred a sufficient amount of energy into his timer.
A short while later, Ultraman Reiga stood up again. Although his chest was still heaving slightly, his timer had stopped blinking.
"Thank you, senpai!"
Having stood up again, Ultraman Reiga had once again recovered his fighting ability.
"Be careful not to touch the Gray Mist with your body, or you'll end up like this."
The recovered Reiga reminded Ultraman Saga. He had been defeated precisely because he couldn't engage in close combat and his long-range beams were useless.
Hearing Ultraman Reiga's voice, Ultraman Saga nodded, then turned his gaze towards the mist.
A seven-colored light appeared in his hands. It was clear... Ultraman Saga was about to unleash a beam technique!!
---o---