Reincarnated as an Energy with a System

Ning spent a few years in his secret realm, crafting the dungeon that one would have to go through. Saphandra helped him with the work, telling him what to do and not to do.

She was bored of the crafting job Ning had been doing for many decades and had decided to return to her space, but now that the task was more interesting she had stayed outside, helping him with the design.

He was barely done with the frameworks of the design in those few years he had spent after killing the many gods, but that alone was way more than anything he had done in the previous few decades.

Those decades weren't wasted either. He had been spending those years gathering treasures. He had many now, but he still needed many more if he wanted to keep his secret realm open for hundreds of thousands of years.

After being done with the work, Ning decided to finally proceed to do something he had been excited about for quite a while.

He was going to use the Space Stone.

Ning went to go get the massive boulder-sized Space stone that he had stashed somewhere in the secret realm since he could not store it in his storage space.

Once he got it, he took it out to an open space in the secret realm where he was now going to absorb the space stone into his body.

He went to a random world where he could spend the many years the System had told him would take for him to absorb it all.

Saphandra wanted to watch how it was done, so she was also outside.

"How do I begin?" Ning asked his system.

<You need not do anything. The System will do everything at the cost of 26 Quintillion Energy for this size of Space stone.>

That was a massive number, but it was half of what Ning had collected after coming to this universe, so he was more than okay with it.

"That's fine," Ning said.

<Place your palm on the space stone and the system will start.>

Ning nodded and touched the space stone. As soon as he did, he heard a few notifications at once as the light shone from his palm and energy entered the Space Stone.

<Conversion of Space Stone has begun>

<Securing all the space in the Space stone.>

<Creating an Inner World>

<Consuming Space>

<Consuming Space>

.

.

.

Ning lost track of time as he heard only the same thing from the system for a long time. He tuned out everything he was hearing and sensing and focused on absolutely nothing.

Time passed and the space stone in front of him shrunk very slowly, but it did shrink. At some point, even Saphandra got bored because of how long it was taking, and so she went back to her own spirit space.

Ning's mind stayed numb to the passing of time until he felt the energy transfer being cut off. His mind woke up and he saw that the space stone in front of him was no more.

<Conversion complete>

"Oh," he looked surprised. "So… it's gone."

Ning took a few seconds to take in what had happened and then tried to look inside himself.

When he did, he saw exactly what was inside of him.

Nothing.

More accurately, there was a vast amount of nothingness. Everything was pitch black since there was nothing.

"So this is the world inside of my body?" he asked with a surprised expression on his face.

<Yes>

Ning continued looking around. He could tell that he wasn't physically present there, but he did have every single sense his physical body would have had it been there.

"It's so weird how I feel like I am everywhere at once," Ning said.

<You are. You are the owner and creator of this world, thus you are its god.>

<You are omnipotent and omniscient in this world.>

"But not omnipresent?" Ning asked.

<You can either be present outside of this world or inside of this world. You cannot be present in both places at the same time.>

"Oh, does that mean I can come here with my physical body?" Ning asked.

<Yes. However, it makes this world vulnerable when you are in here, so you should not come here unless you are perfectly safe in the outer world.>

"I see," Ning said. "I will make sure to not mess that up. But I should be fine coming here like this right? I'm just a thought here after all."

<Yes, this is fine.>

"Well, I should be fine going in right now too," Ning thought. He called out Saphandra and together they went into this new world that existed in his body.

"Wow, that is so easy," Ning thought. He had only wished for it and the both of them had appeared inside.

"Wait, where am I? I can't see anything," Saphandra complained. Ning could hear her through their bond and created some light that only lit up the two of them.

There truly was nothing to do inside, so after spending some time there, the two of them left outside.

Once out, Ning asked the system. "How am I supposed to fill the space up? I need sun and some planets," he said.

<You will need to either create whatever you want inside yourself with the energy you have or steal them from the other universes.>

<however, you do not have nearly enough energy for either task.>

"Of course, I don't," Ning said and shook his head. Now that he was done here, it was time for him to leave the place and continue on his task of finding resources to build up this secret realm."

Ning chose randomly a world to visit and arrived in the forest of a world called Medicine Heaven.

He arrived at the outer edge of a forest and slowly walked out towards the outskirt of a town.

When he did, a man walked up to him and bowed.

"Greetings, Sage of Ten Thousand treasures. I am honored to have finally met you."