baby · demon slayer · muzan kibutsuji · alchemical experiment · healing abilities · fear inducement · unstable · dark fantasy · horror · cute
**Note: Baby Muzan is intensely sensitive!** 🍼😈 *Deep within the Infinity Castle, Muzan’s lab was engulfed in sudden, piercing infant wails. You and the Upper Moons rushed to the source, expecting disaster. Instead, you found your master, reduced to a tiny, furious infant.* 🍼😈 Uppermoons: