Odin did think everything through and personally led the people to a swarthy cave.

"This is a new tunnel that I have people dig to connect to the underground railway that Mimiron has secretly built, but it is not completely connected yet, and after we enter it, after successfully interfering with Ulduar's system, I can immediately open the middle section, so that I can sneak all the way to the core area of Ulduar." Odin pointed to the deep hole.

Su Chen immediately understood why this Valhalla had landed on the ground, and it was estimated that what he was doing was to cover this underground passage.

He did not doubt the truth of Odin's words.

There has always been a large number of underground passages underneath Ulduar.

Su Chen had already discovered that there were underground passages under the Storm Crags, which were used by several Titan Guardians in the past to connect the temples in various places, transporting both matter and the energy provided by the Creator's engine.

Ulduar is the key to the entire Storm Cliffs, and the underground passage to Ulduar is naturally the largest and largest.

Lorcan has long been on guard against these underground passages, and the passages that lead to the core area of Ulduar have long been blocked.

Even Mimiron's subway could not be reached to the outside world, so Odin himself could only dig a section, and he did not dare to connect the two tunnels in advance, and could only open it after interfering with Ulduar's control system.

Seeing that Odin had already prepared everything, they did not object, and soon followed Odin into the dark underground passage.

It was dark inside the underground passage.

However, everyone who enters here is not a strong person, and they will not be affected too much by the darkness.

"How does this feel like a secret sneak...... Su Chen thought secretly in his heart, but looking at the Titan Guardian who was dozens of meters tall beside him, he couldn't help but be speechless.

With the size of giants like Odin and Azadas, it's really hard not to be discovered......

Perhaps Odin and the others also noticed this, and quickly changed their body size.

Odin reincarnated into the old man Su Chen had seen in the Broken Isles, Azadas had turned into a big man with cheeks, and several of the caretakers such as Setsh had changed their appearance to be comparable to the natives in the desert, and they all wore turbans.

This section of the underground passage was not long, and everyone was soon at the end of the tunnel, and then they had to stop, quietly waiting for Odin to open the passage ahead.

Odin was also quietly waiting.

Suddenly, Su Chen felt a violent tremor on the ground under his feet, and even if he was underground, he could still hear a huge explosion...... That's when the fighting on the ground has broken out.

The massive coalition forces have begun a frenzied siege of the core of Ulduar, with magic and bombs raining down and dragons roaring and spewing flames.

If it weren't for the fact that Ulduar's buildings and ground were far stronger than the outside world, I am afraid that they would have been blasted out of the bottomless hole, and in order to confuse Loken, Odin also deliberately made extremely realistic illusions for Su Chen and others, allowing them to stay behind and 'command' the army.

However, the defensive barrier in the core area of Ulduar is indeed extremely powerful, even if it is attacked by the coalition forces frantically, it still stands still.

"Now it's time for us to do something." Odin said as the light in his hand flowed.

Under the illumination of that light, the rock in front of them melted in an instant, and then disappeared completely, and a deep underground tunnel quickly appeared in front of everyone.

Odin walked at the forefront, speechless all the way.

After walking more than 100 meters, the front suddenly opened up, but it was already connected to the underground railway left by Mimiron.

There was even a locomotive parked on the tracks with its lights flashing, and I wonder if Mimiron had arranged it to greet everyone.

"Inside Ulduar, the interference effect will be worn off after nine minutes." Odin's voice rang in everyone's ears, which invisibly deepened everyone's tension.

With the strength and speed of everyone, they naturally disdained to ride the locomotive, and immediately rushed along the railway track as quickly as a streamer.

In less than half a minute, everyone had rushed out of the underground railway, and in front of them was a huge underground workshop.

The dark underworld is surrounded by all kinds of machinery, from hair-thin springs to screws larger than humans.

Lights of various colors flicker endlessly in the dark, and from time to time there are mechanical prompts or alarm sounds, making people feel as if they are in a mechanical world.

"Where should I go? Can you find Mimiron? The Red Dragon Queen looked at the several forks in the road in front of her, and looked at Odin with some concern.

"I should be able to find him, I can feel like he's close to us, huh...... Just a little ahead......" Odin said, but his face sank.

There were indeed people coming in front of them, but it was not one, but a large area of black pressure.

Su Chen couldn't help frowning, there were all mechanical creatures in front of him, with various shapes, but judging from the muzzles and missiles on those mechanical creatures, the combat effectiveness of these guys was not low.

Countless muzzles and missiles were aimed at the men, and the surrounding area was surrounded by pitch-black bomb robots, and behind these mechanical creatures, a huge mechanical gnome was operating a strange device.

"Is this a trap?" Everyone's puzzled eyes immediately fell on Odin.

"No, if that's the case, it's Loken who awaits us here, and there must be something wrong with Mimiron's soul." Odin said in a deep voice.

Mimiron had lost his original body tens of thousands of years ago by Lorcan's plot, but the mechanical beings he created saved his soul and placed it in the body of a giant mechanical gnome.

However, due to the fact that death still caused a lot of damage to his soul, coupled with the control of Ulduar by Lorcan and Yogsaron, Mimiron also seems to have lost himself, and has spent tens of thousands of years in Ulduar's workshop to develop various machines, most of which are combat machines!

Perhaps because of the chaos in Mimiron's soul, Lorcan didn't exert much control over the former King of Creation, at least not as much as he did with Guardians like Freya and Torrim.

As a result, Mimiron had a lot of freedom, not only to build machines at will, but even to send those machines outside, and some of them became the mechanical army to defend Ulduar.

This can be said to be a blessing in disguise, which allows Mimiron to connect with Odin.

However, judging from the current situation, Mimiron is absolutely in a state of chaos at this moment, so much so that they are regarded as invading enemies.