The moon was high in the sky and before we knew it, it was already early morning.

A few hours ago, Heimerdinger sent away all the students, leaving only Viktor and Skye behind.

The last time Heimerdinger created a device that allowed people to travel to the spiritual realm was hundreds of years ago in Ionia.

The original mechanical device has long since become scrap metal and is still in Heimerdinger's laboratory in Bandle City.

There is a portal from Piltover to Bandle City, but the speed of time flowing between the two places is different. It may take several days or even weeks for him to go back to his hometown and come back.

By then, Valentina would have been completely wiped out...

However, Heimerdinger clearly remembered every design he had made, so it was no problem for him to temporarily develop a shuttle device that could break the barriers between the material and spiritual realms.

Skye went to the warehouse to get the Hextech energy crystal, while Li Lin and Viktor assisted Heimerdinger in making mechanical devices according to the sketches he drew in the laboratory next door.

The degree of refinement and speed with which Li Lin manufactured machinery far exceeded the expectations of Heimerdinger and Viktor, and even surprised them.

The machine, which was originally estimated to take at least 10 hours to complete and conduct preliminary feasibility tests, only took more than an hour under Li Lin's operation.

This was the result of him intentionally slowing down and waiting for Sky to get a few energy crystals before completing the work.

Otherwise, with the various enhanced abilities of the "Mechanical Heart", it would only take him half an hour to create such a simple shuttle device.

The "Realm Shuttle" was named by Heimerdinger and is divided into two parts.

One part is installed and fixed in the material realm, using energy to break the barrier between the two realms and serving as an anchor to guide users who enter the spiritual realm back.

The other part is worn on the user like armor for protection, and can also connect to anchor points in the material realm to prevent them from getting lost in the strange magical world.

Since Heimerdinger originally developed this device in Ionia, where the two realms merged, the barrier was weak and did not require too much energy to consume.

After moving to Piltover, he made adjustments and found that this two-part device required 5 energy crystals.

Three of them are used on the base on the ground, and the other two are installed in the mechanical armor worn on the body.

After more than three hours of testing and debugging in various aspects, Heimerdinger was finally completely sure that the device was exactly the same as he remembered.

With his "data-driven thinking", Li Lin knew that there was nothing wrong with this equipment.

But Heimerdinger has always believed that science requires rigor, and Caitlyn and Viktor were not very reassured about this, so he chose to remain silent.

When everything was ready, Victor stared at the device on the workbench with a worried look on his face, then looked up at Li Lin.

"Are you sure you want to do this? I think... we should have other options."

"Yes, yes, I also think there is no need to use such extreme measures." Sky nodded in agreement.

"Nightmare cannot descend upon the material realm. If we want to resolve it, we can only start from the source, that is, the spiritual realm."

Li Lin shook his head and looked at Valentina, who was sitting drowsily beside Caitlin. "Besides, Professor Zindello doesn't have much time left."

His eyes met Caitlin's, and the depths of her beautiful sapphire eyes were filled with tension and worry. "Li Lin..."

Li Lin walked slowly to her side, unfolded his armored hand, placed it on her shoulder, half bent down, and looked at her at eye level.

With his other hand, he scratched her nose and gently pinched her delicate face.

"Don't you still believe me?" Li Lin put on a gentle smile and spoke in a calm tone.

"I……"

Caitlin bit her lower lip and stared into Li Lin's brown and black eyes.

Even if she could see a hint of timidity in it, she would not allow Li Lin to take the risk.

Unfortunately, Li Lin was determined to succeed in his plan to defeat Mordekaiser, and Caitlin only saw his confidence and determination.

In the end, she was defeated.

"You keep doing things that make me worry." Caitlin sniffed twice, her eyes slightly red. "Can you really guarantee that you will come back safely?"

"I think I shouldn't establish a G..."

"What is Flagg...?"

"Nothing, just a saying from my hometown." Li Lin smiled dumbly, "Don't be too sure before doing something, otherwise the result will be exactly the opposite of what you expect."

"I also understand Ionian, how come I haven't heard of this slang?"

"Ionia is so big, and the dialects vary a lot from place to place. I might not even understand them all, so how can you possibly understand everything?"

Li Lin gently pinched Caitlin's nose, causing her to pout slightly in dissatisfaction.

Then, he glanced at Valentina, who was almost unable to open her eyes, and whispered to Caitlin, "Okay, Valentina is almost asleep. If we wait until she starts dreaming, it will be too late."

When he stood up again, Caitlin stood up with him and took a step forward.

A light and elegant scent of violet wafted into Li Lin's nose. Before Li Lin could react, Caitlin's right hand had already reached behind his head, forcing him to lower his head.

At the same time, she tiptoed, closed her eyes and moved closer to his face.

Accompanied by a burst of warmth and wetness, Li Lin's eyes widened slightly. He didn't expect Caitlin to be so proactive, direct and eager.

However, Li Lin knew that this was her way of expressing her concern for him and her hope for his safe return.

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