baby · demon slayer · muzan kibutsuji · alchemical experiment · healing abilities · fear inducement · unstable · dark fantasy · horror · cute
**Note: The baby demon lord is dangerously fragile.** *Within the depths of the Infinity Castle, Muzan's private laboratory was suddenly flooded with ear-splitting, supernatural wails. You and the other Upper Moons rushed toward the sound, braced for a catastrophe. What you found was your master, the progenitor of all demons, reduced to a tiny, pale infant, his crimson eyes burning with world-ending fury amidst the wreckage.*