The third demon lord

Carrera walks through the corridors of her mansion. She is annoyed, since she's trying to find someone, but this house is ridiculously big.

"Tch." She clicks her tongue, as she runs into another dead end. It's not her fault that she never bothered to memorize the house! It's not, okay!

She searches and searches, without result. Just as she is considering blowing the whole place apart, she stumbles into a huge room.

When she looks inside the room, she is stunned. Coincidentally she also found the person she was looking for, in the room, but that's no longer in her mind.

"What is this?" She mumbles. In front of her are piles upon piles of treasures. Gold, magisteel, silver, platinum, demonsteel. It's so glittery and shiny that Carrera has a hard time even looking at it.

What truly shocks her though is the amount of these things in here. She can't even see the end of the huge pile. Even a country couldn't compete with the amount here. She doubts that even if all the world's countries put their treasures together, could they measure up to this.

One pile is full of raw materials, where as if she looks to the left. There is another pile full of weapons and armour.

"W-what the hell is this?!" She exclaims in shock.

"What are you screaming?" A sudden voice from behind scares her.

"Kyaaaa." She jumps forward and looks back. The voice came from a familiar person. The person she was looking for, Artoria.

"Hahaha." When I hear the noise Carrera makes and see the face she has on, I start laughing.

When she realises what she has just done, her face changes colour into a bright crimson and she becomes angry.

"God damn it!! What are you even doing here?!" She yells at me.

I finish laughing and then look at her with a smile. "I was just tinkering on some equipment." I tell her.

"What?" She looks at me suprised. Oh yeah. She doesn't know about my hobbie.

"It's a hobbie of mine. I have so much treasure that I don't even know how to spend it, so I just make weapons and armour. I also release my aura in here regularly." I explain. She listens, but doesn't answer. Instead just looks at me dumbly.

"Well anyway. It's about time we made you into a demon lord." I say and stand up.

"A demon lord?" She questions. We walk out of the room and head to out of the house.

"Yes. It's something I became after I massacred a city full of humans and collected their souls." I explain.

"Hmm." She humms without explaining why.

"To the main continent we go." I say and teleport us there.

We fly around and find a city full of humans. Before Carrera can go and kill them off, I stop her.

"Wait." I grab her shoulder.

"What?" She asks brusquely. She doesn't like it when I stop her.

"I found something better. It seems a war is happening right now and the armies are fighting. I suggest we go and wipe them out instead." I explain.

"Is there a difference?" She shakes my hand off and asks.

"Hmm. This is just a theory, but isn't it logical that stronger souls are better? Usually warriors have the strongest souls, so you get my point?" I smile at her.

"Whatever." She looks away. I fly off and she follows me. Soon we come upon a scene of war. Two armies are going at it fervently. It's a joy to watch.

"Hmm, around 100,000 men? Well off you go." I shoo her off. She looks at me and makes a face, but I ignore her.

Nevertheless she goes and starts killing everyone.

The new addition on the battlefield throws everything into absolute chaos. Especially so, since Carrera starts raining down extremely destructive spells. The humans fighting are defenceless in front of her might.

Within 10 minutes almost everyone is dead. Some have escaped, because neither of us really care about it. Then I hear the voice of the world.

[Notice. The individual Carrera has met their requirements for the harvest festival. Beginning harvest festival.]

I see Carrera stumbling around, heading towards me. So I quickly appear beside her.

"Go to sleep. You will evolve now." I tell her. She nods and falls asleep. I take her in a princess carry and teleport back to our house.

....

....

A few days later, Carrera opens her eyes. I feel her awaken, so I head to her position. I knock on her room.

"Come in." She says.

I walk in and look at her. She's sitting on her bed, seemingly in thought.

"Well congradulations on becoming a demon lord." I say.

"Thanks." She nods. Looks like she's focusing on her new skills. I recieved a small gift from her as well. It's a unique skill called procreation. Essentially it let's me reproduce asexually. I can also alter a few of my offsprings properties, like gender, or inherited power and so on.

"Did you get an ultimate skill as well?" I ask her.

"I did." She responds, however it doesn't look like she's interested in elaborating.

"Fine I'll leave you alone." Noticing her mood, I tell her and leave the room. It was getting awkward just standing there.

I head to my workshop and start creating gear again. I don't have a skill to make the process any easier, so it all comes down to my personal ability.

....

A day later.

I walk in on Carrera testing out her abilities. I say walk in, but we're in the middle of the sea, so...

"Now we should be able to spar." She speaks to me without looking at me.

"It's about time." I smile. Then I create a seperate dimension with my ultimate skill. Our fight would probably destroy the world.

Once the space is created, we take our stances and fight.