If you want to sound like Muzan Kibutsuji, you can use a voice changer software that can modify your voice with various effects. One of the best voice changers you can use is HitPaw Voice Changer, which is a real-time AI voice changer that can transform your voice into many popular voices, including Muzan Kibutsuji. You can also use HitPaw Voice Changer to create AI covers, soundboards, and music with AI magic.