Reincarnated as an Energy with a System

"Promise to us, in the name of your god that you have never, and will never henceforth hurt a single human ever in your life again," she said.

"I…" Ning didn't speak. He was reading the notifications in front of him with incredible shock.

[Quest: Swear an Oath

Swear an Oath to never hurt another human again unless they hurt you first. You will swear an oath directly to the Demon lords, so if you ever break them, you will face their wrath.

Failure Condition: Intentionally harm a human before you're allowed to harm them.

Punishment: Complete Deletion of Character and restart with a Cursed Class.]

'What the fuck?' Ning looked at the words in front of him with utter shock.

There was a quest with no winning condition, and only a losing condition, and losing meant you had to get rid of anything and everything you had worked for this whole time.

'I can't, right?' Ning thought. 'Why would I ever want to say this oath?'

"What if I say it? Will you let me go?" Ning asked. "I can promise that I've never harmed a human before, but that doesn't mean that I won't harm them in the future, especially if they come after me as you did."

"I don't care if you're a human, a demon, or an angel. If you hurt me or my friends, you will get hurt in return," Ning said.

The humans were a little surprised by his conviction. The girl thought for a bit and asked, "Are you willing to harm the demons?"

"If need be, yes," Ning said.

The girl suddenly turned around and started speaking in hushed tones. Ning had no idea what they were talking about.

The girl quickly turned around. "What do you want?" she asked.

"Right now? To be free," Ning said.

"No, what do you want for hurting demons?" she asked.

Ning's eyes narrowed a bit. "Well, first of all, I need a reason," he said. "I'm not someone that hurts others just because you say so."

"Of course, there is a reason," the girl said. "Your people killed everyone we knew and loved, and now you're doing it to others. What if someone came and killed everyone you loved and care for? What would you do?"

Ning sighed. "That's a solid argument," he said. "But I'm still not convinced yet."

"Then what about this?" the girl pulled out something and showed it to him.

Ning tried to grab what it was, but the girl quickly pulled the skill book away.

"That's a skill book. Are you trying to sell a skill in exchange for my getting my help?" he asked.

"Yes," the girl said without hesitation. "Us infiltrating the Demon camp and killing them would be incredibly hard, so we need you to do it for us. Are you willing?"

[Quest Obtained]

[Quest: Demon Extermination.

Type: Permanent

Kill any and all demons that you are given the name for in order to obtain rewards from the humans all around.

Rewards: Will improve as you go along.

The first reward is guaranteed to include the skill book 'Demon Stats'. Killing an enemy that is a high-ranking demon or above 20 Levels from you gives you a random permanent stat.

The stat is doubled if it is a direct mission given by humans. ]

[Warning: If you are ever found out to be behind this killing, You will have a bounty put on your head.]

'Shit!' Ning thought. 'That's tempting.'

He analyzed the situation as well as he could and came to the answer that this was one hell of a quest for him.

The extra stat, while it may look like it wouldn't amount to much since killing enemies above 20 levels gave some stat, he would surely end up with a lot of stats, if he found a way to do so.

For now, all he could think of was fighting bosses.

"Well?" the girl asked. "Do you choose to be a pawn or a hostage?"

Ning sighed. "Fine, I'll accept your offer," he said.

"Swear to your gods!" the girl said.

"I swear on my gods," Ning sighed and complied.

[Quest Accepted.]

[Wait for the human's next target.]

"Now swear that you won't harm any humans, or we won't let you out off here," they said.

"Seriously?" Ning sighed. "I swear on my gods that I will not hurt the humans that don't try to harm me first. Is that enough?"

[Oath Accepted.]

'Woah,' Ning thought. He didn't expect the game notifications to appear here. 'Wait, I hope this doesn't backfire on me anytime soon.'

After he had finally said all of his oaths, only then did the humans there let him out of the cage.

Only after coming out did Ning's vision improve, letting him see things more clearly.

The girl named Gariin was young and beautiful, but she wore tattered clothes with a dirty face that hadn't seemed to have been washed in ages due to the demon's sudden arrival on the continent.

However, no matter how dirty she was, her bright and shining eyes looked quite impressive, and so did her beautiful wings that were shaped like a butterfly's.

Ning looked at the other two men. One was named Foreen, and the other didn't speak.

They were both equally, if not rougher than the girl they were will. Also, the two of them had dragonfly wings as opposed to butterfly wings like the girl.

"Come," the woman said and the two men followed her like they were her bodyguard.

Ning looked at the other cages and saw signs of people being there, entrapped.

He wondered if there were more demons in this cave, kept in cages. If there were, they had most likely died too.

'I should have died too,' Ning thought. 'I would've been respawned in the Waterfort city, wouldn't I?'

Going all the way back to the first city was annoying, but that was a good choice, compared to what he had gotten.

Still, the rewards he would be getting for completing the mission the girl gave would definitely be worth it in his eyes.