Anime & Comics
Muzan: Conquering multiverse.
*Original Fanfic:* *No System* A guy from the modern world suddenly wakes up as Kibutsuji Muzan in the Demon Slayer world. Now he will attain true immortality, travel to different worlds for fun, and become stronger on the way. "M-master Muzan! A-are you smilling??" "Hm, so what?" "Nothing. I was just more used to your sadistic smile." "......" In another world. Hephaestus: What!? you want me to forge a weapon to deceive the world's will?? Muzan: yes..... Hephaestus: Fine! But you must join my familia! Muzan: If I did that you'll kill me :) Ongoing worlds: Demon Slayer, Reverend Insanity, Danmachi, Solo Levelling.