[Demon Slayer Crossover] Immortal Blade

Gui Longze Race: Altana Registered residence: Oeyama Raised from childhood by Oeyama's turncoats, he is rumored to be the illegitimate son of a certain Oeyama Demon King and a silver-haired demon general, and a candidate to become the next Demon King. However... one day, he woke up to hear that some jerk had stolen the Demon King's title and was living it up elsewhere. Gui Longze: ?!!! As long as this planet doesn't blow up, I can't die.jpg. Bring it on! Let's blast each other! 1,800 bucks! Demon Slayer Corps: Why did you join the Demon Slayer Corps? Gui Longze: Someone stole my father's title! Demon Slayer Corps: Kibutsuji Muzan, you bastard! How could you break up someone else's family by turning the child's father into a demon and leaving such a young kid homeless? Slay the demons! Muzan: ??? I didn't! I swear! Stay back! P.S. Spit out every last one of those character deaths! Next novel: [Fate/Grand Order] When Altana Becomes Solomon Jedidiah, the one Jehovah loves. In one world, Solomon was a child of the planet, born from a mother's womb and fused with a soul from another world. And so the all-knowing, all-powerful king began to fret: How was an immortal Altana supposed to make it through the story? Alaya: Don't die. Just come work for me! We've got tons of worldlines here, and all sorts of sights to see! Polenos: ... Thanks, but no thanks. I'm on a plane, successfully faked my death, and have become human. I refuse to work overtime. Isn't strawberry cake delicious? Isn't it better to stay home and watch Magical Merlin? The young man clutched the cat in his arms, radiating the desire to become a shut-in.jpg P.S. This is just an idea born from being emotionally devastated by the doctor's self-sacrifice. Solomon may be portrayed as too perfect, the logic may fall apart, and characters may be out of character! Historical-detail sticklers, enter at your own risk. Theme: Even if the world has changed, Oeyama still has its style.