As early as after Lu Xiao killed Badr in a coma, he had met the black dragon suspected of Nidhogg in a dream, a second to be exact.

At that time, the two sides didn't have much time to communicate, just took a photo and it was over, Lu Xiao didn't expect that the world-destroying black dragon would take the initiative to let Freya contact him.

"Niederhogg?!"

Mimir exclaimed, "The king of the black dragons who gnawed the roots of the world's trees! Why would he want to see Lu Xiao? ”

Freya shook her head: "I don't know the specific reason, it only said that it has the information that Lu Xiao wants." ”

Lu Xiao was a little surprised: "The information I want?" ”

'I want more information...... Which one is Nidhogg talking about? ’

There must be a reason why the Black Dragon of the World Destroying issued an invitation at this juncture, and through the first two brief contacts, Lu Xiao can basically confirm that the other party has no malicious intent.

"Mimir, how do I get to the root of the World Tree?"

"Well...... this"

Mimir thought about it for a moment before he said with some hesitation: "Theoretically, you can go all the way down through the special spaces of the World Tree to connect the various realms, but no one has ever done this before. ”

"Give me a little time to think about the plan, and I expect to give an answer early the day after tomorrow."

It was late at night when Freya came to visit the Temple of Tyr, and after a long discussion and exchange of information, it was already past five in the morning.

In order to maintain their energy to cope with the battle that could come at any time, everyone began to recover their depleted energy in their own way before Mimir could draw conclusions.

When he returned to his room to meditate, Lu Xiao once again vaguely felt Nidhogg's gaze.

There was no hostility in those huge vertical pupils that seemed to be hideous, and Lu Xiao even vaguely felt a trace of closeness.

'Is it ......'

……

On the morning of the second day of their rendezvous with Freya, the people in the Chamber of Secrets gathered again and began to determine the exact coordinates of Tyr's eventual disappearance.

Lu Xiao was sure to free Tyr from the space-time rift, but he needed accurate spatial coordinates.

As the saying goes, if there is a problem with the coordinates, Tyr will likely be torn to pieces by the chaotic space while being frozen out of time, and must be operated precisely according to the same coordinates.

A group of people in the battle chamber repeatedly compared the still images recorded by Freya with the real scene.

This process was not easy, when Tyr fought with Odin and Thor, Jörmungandr had not yet crossed over from the future, the water level of the Lake of the Nine Realms had not risen, and the bustling scenery of the Lake of the Nine Realms was very different from the current desolate ruins.

Synthesizing Mimir and Freya's intel, it can be concluded that at the same time as Tyr's disappearance, the Serpent of the World happened to be beaten by another Thor from the future.

Lu Xiao thinks that there should be a connection between the two of them, but it's a pity that Yermungad has entered a state of hibernation, otherwise he should be able to ask it for some relevant information.

In addition to finding Tyr's disappearance coordinates, how to respond to Nidhogg's invitation is also an important issue that needs to be addressed first.

While Mimir was thinking about the plan, Lu Xiao was not idle, and he entrusted Kratos, who was holding the dwarf teleportation stone, to take him through the World Tree passage first.

Lu Xiao hadn't used this way to travel to and from the Nine Realms before.

This special space is said to be a fragment of the World Tree itself, with a large tree standing in the center of the starry sky.

This seemingly impressive tree is actually just one of the branches of the World Tree, and it is theoretically possible to reach the bottom of the World Tree by conventional means, but no one knows how long it will take.

Lu Xiao can feel the special fluctuations from different countries in this unique space, the spatial structure here is very unstable, and if you don't pay attention to it, you may open a spatial passage to a certain world tree node.

After a little investigation, Lu Xiao could not guarantee that he could accurately find the passage to the bottom of the World Tree in this chaotic and overlapping space, so he could only give up for the time being.

Mimir did not live up to Lu Xiao's expectations, he found a method a few hours in advance, but this method was not so easy to achieve.

"Unity Stone, ......"

Lu Xiao rubbed her eyebrows with a little headache.

Unity is an artifact that guarantees Tyr's freedom from world to world, and its power protects it and even allows Tyr to travel to distant Greece and Egypt, unbeknownst to Odin.

Kratos and Atreus used the Unity Stone to retrieve the Kingdom Tower in Jotunheim, and they successfully passed the test of Tyre to restore the Kingdom Tower of Jotunheim to its place.

However, the Unity Stone was also recovered by the mechanism set up by Tyr after the test was completed, and its whereabouts were missing.

"I can only let the person in question Tyr out first, and only he knows the whereabouts of the Unity Stone."

……

Odin has lost Fokine and Wuni, and can no longer monitor all corners of the Nine Realms from all directions.

The Patronus Heimdall replaces the work of the two ravens, but he only has one pair of eyes and cannot observe all the worlds at the same time.

At Odin's orders, Heimdall focused most of his attention on the atrium world of Midgard.

With the help of the Rainbow Bridge, Heimdall's eyes have the ability to see through all falsehoods, and even the spells in front of Tamamo can't work in front of his eyes.

When Lu Xiao and the others secretly went to Iron Bay in the southwest of the temple under the concealment effect of the concealment spell, Heimdall's golden eyes could see their movements clearly, and he quickly told Odin this information.

The One-Eyed King frowned puzzled: "Iron Bay used to be the most important port on the Lake of the Nine Realms, but it was completely abandoned hundreds of years ago, why go there?" ”

Heimdall couldn't answer, his eyes could only observe, not predict.

Odin subconsciously wanted to call Vader, the god of the forest, but considering the death of Hoddle not long ago, Odin suddenly changed his mind.

He didn't want to continue to damage important chess pieces before Ragnarok began, but at the same time, he didn't want to just watch Lu Xiao and the others swagger under his nose.

With a roll of his eyes, Odin thought of a plan to drive away the wolf.

"Helmod."

"Yes."

"I remember, there seems to be a mighty dragon sleeping north of Iron Bay, right?"

"Yes."

Helmod replied respectfully, "The Demon Dragon Fafnir, according to legend, was transformed by a certain money-hungry dwarf, and was imprisoned somewhere in the western part of the Lake of the Nine Realms. ”

"After a long period of captivity, Fafnir gradually lost his sanity and became more and more insane, indiscriminately attacking all intruders who dared to approach the treasury."

"Hehe~"

Odin sneered twice: "Helmod, I have a task for you. ”

Helmod, the son of Odin and a personal attendant who had followed the god-king for countless years, guessed what he meant from Odin's short words.

Knowing this, Hermod saluted respectfully: "By the command of the God-King, the wrath of Fafnir will consume the conceited outsiders." ”