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The three people that had appeared to intervene were the Ancient One, Odin, and Heimdall (MCU), and it was also the Ancient One herself who sent Liam into unconsciousness. And it was Mephisto who had attacked Liam. 

Fenrir witnessed the person who had just arrived. The person who appeared was a woman clad in an orange trench coat and pants. And she wasn't the only one. A colorful light fell on the ground, and out came two men wearing shiny armor. One held a spear, while the other held a broadsword.

"You have stepped on foreign soil. Get back to where you belong," the woman said as she controlled the surrounding environment with a flick of her hands.

"This is not your realm," the man with the spear shouted as he stabbed the ground with his spear, sending a shockwave at the man who had just inflicted such adversity on Liam.

"I didn't come here to start a war. This man has the primordial fire in his blades. That is not supposed to belong in this world," the man said. This made both the woman and the two men look at the two blades lying on the ground. "I am here to take it away, but this man refused to surrender."

The man was right. Those blades did contain primordial fire. Primordial fire was one of the most ancient flames, able to burn and hurt anything, and it wasn't supposed to be in the possession of someone from this world. It belonged to the Underworld, beside hellfire.

"That maybe true. But did you ask permission from me, before trying to snatch it away from my student?" the Ancient One said. 

".." Mephisto didn't have an answer to it and nor did he have the knowledge that this unconscious guy here was the student, which meant he was the next Sorcerer Supreme. 

"You have some galls coming here." Ancient One as her hands started to shine, producing Rings of Raggador. "You have broken the sacred balance and you have hurt what is mine."

A golden sigil flared beneath her feet, expanding outward. Meanwhile Mephisto had let go of his scythe, and sharp claws came out of his hands.

"You think your tricks frighten me?" Rivers of fire erupted from the ground, forming grotesque, screaming faces as they lunged at her. The Ancient One did not flinch. With a simple motion, she twisted her fingers into a spiral, and the flames were devoured by a void of absolute silence. 

Then, she struck.@@novelbin@@

One step forward, and the entire island seemed to shift. Mephisto barely had time to react before reality folded in on itself—his own limbs distorting. He roared in frustration, summoning a tidal wave of darkness to smother her, but she carved through it with a blade of pure light.

A second attack followed—a flurry of golden discs slicing through the air, each one honed to cut through magic and flesh alike. Mephisto deflected some, but one carved deep into his shoulder.

"You arrogant human—"

His words were cut off as she materialized behind him, striking his chest. The impact sent shockwaves rippling. 

"You will not leave here unscathed," She hissed. "This isn't your backyard."  The Ancient One was punishing him.

He snarled and tore open a rift, attempting to retreat into the safety of his own domain. But the moment he stepped through—he found himself right back where he started.

"You do not leave until the debt is paid." It was Odin himself who struck and forced him to reel back. 

"You can't hold me. If you do so, I won't hesitate to bring forth my army and call upon all Hell lords to let them know that your student has primordial fire. I would like to see how Vishanti or Aggomoto defends you." Mephisto wasn't someone to back down easily and cursed at them. 

"You think you can scare me with the name of Hell lords?" Ancient One roared as she folded reality itself again on Mephisto crushing his feet. He gritted through the pain. Each attack was an attack on his main body as he didn't come while possessing an avatar. And also because the power of Dormammu wasn't a joke.

The reason why primordial fire was important was because it could hurt any dimensional beings. It was also the reason why Liam was able to hurt the man when he used the Blades of Chaos, but the man was too powerful, and Liam was a bit ignorant. Though the man showed that he had healed the wounds inflicted by Liam, he wasn't actually healed. It would take a lot of time to repair his wounds. That was also one of the reasons why the man called Liam ignorant—otherwise, Liam would have faced the man from a much further distance and not allowed the man to lunge at him. There were other reasons too of why Liam had lost that fight so horribly but it was upto Liam to figure it out slowly.

And then again, Liam didn't even know the identity of the man.

Earth had an agreement with the hell dimensions that they wouldn't step over their boundaries on the condition that Earth didn't have weapons that could potentially hurt them or kill them. And Liam had broken that agreement by having the Blades of Chaos.

"That maybe so but the your precious Earth wouldn't be able to take on the army of multiple hell lords together." Mephisto said. This made Ancient One silent. 

"You dare threaten us, you evil being." Odin roared and used his Gungnir to send an attack to Mephisto which threw him back. But it didn't take much time for Mephisto to get and give them a devilish smile, while his body was still healing. 

"You can take it away, but you will never step foot on this place again or send your minions to harass him or his family. If you agree, you can go. Otherwise, we will continue the battle here, and I would like to see how long you can survive away from your dimension."

"You are as feisty as I remember, woman." Mephisto muttered. 

"And you are as stubborn and weak as I remember, preying on ignorance. If he had enough knowledge, he might have been able to wipe the floor with you," Odin replied.

"Hmph… Count your days, old individuals. Your days are numbered," Mephisto replied. He didn't waste more time. He took the blades and was ready to leave, but the Ancient One stopped him.

"I said you will not harass his family. Who will heal the wolf here?"

Mephisto wanted to refuse, but then he saw Odin pointing his spear at him and the Ancient One reality bending powers hovering over him. He flicked his hand, and the wound in Fenrir's body disappeared. Fenrir, who had lost consciousness a few seconds ago, got up with a start. He lunged at Mephisto without a second thought, but by the time its teeth could tear flesh from the man, he had disappeared, smirking back at the wolf.

Fenrir, seeing its enemy escape, growled and howled for a good minute before turning to the Ancient One. It remembered that this woman had delivered the final blow to its master, and now it wanted to rip her to shreds. The Ancient One looked at Fenrir and clapped her hands, causing tendrils to grow from the ground and hold onto its four paws.

The Ancient One stepped forward, and the magical tendrils wrapped tightly around Fenrir's limbs, preventing the beast from lunging at her. Despite its wounds having been healed, the wolf still seethed with rage.

"Enough," she said. "I have no quarrel with you. But your master needs you now more than ever."

Fenrir thrashed against the bindings, snarling defiantly.

"He is still alive," the Ancient One continued. "Immortal, yes—but not invincible. He has lost his hand. He needs care."

At this, Fenrir hesitated. It turned its head slightly, glancing back at Liam's unconscious form. Blood still seeped from the stump where his hand had been, staining the ground beneath him.

"Your master's fight is not over. If you want to serve him, if you want him to return to full strength, you will take him to the one who can help him."

Slowly, Fenrir's posture eased. The tendrils withdrew, slithering back into the earth like vines retreating into the soil. Fenrir remained still for a moment, then huffed, shaking its massive head.

The Ancient One raised a hand and began to weave a portal in the air. Golden sparks spiraled outward, swirling into a circular gateway. On the other side was the interior of a sleek, modern home.

Fenrir let out a short, sharp breath before stepping toward Liam. With a careful but firm motion, the wolf bent down, gripping Liam's unconscious form in its powerful jaws, careful not to cause further harm.

"Go," the Ancient One instructed. "Take him to his friend."

Fenrir gave one last glance toward her and Odin before stepping through the portal and disappearing.

"He has helped my son in the fight against the Frost Giants," Odin said.

"I know. But he is ignorant. He has abilities that even I can't understand, but his ignorance almost cost him his life today," the Ancient One said.

"Then you should teach him. Maybe he will not take such rash steps again before thinking," Odin said.

The Ancient One didn't reply but opened a portal and stepped into it. Heimdall didn't need to be told. He summoned the Bifrost and left the same way they had arrived.

Leaving behind an island filled with corpses that came from hell. This island, even after centuries, wouldn't give birth to any living being, nor would any birds land here. This island would be a place ignored by humanity forever.