This song is an arrangement of 少女綺想曲 ～ Dream Battle from Touhou Project.
原曲：少女綺想曲 ～ Dream Battle

Rhythm​Entropy - Cyber Prayer

Video: https://youtu.be/cBErx1CjWCU?si=eURq6XcQfFAC-rtX

Rhythm​Entropy - Courage | A Syntakt Jam

Video: https://www.youtube.com/watch?v=LOIz1XZHM4Q

Video: https://www.youtube.com/watch?v=C-XvHZKm4vs

This song is an arrangement/remix of Muzan vs Hashira/Infinity Castle Theme from Demon Slayer: Kimetsu no Yaiba.

This song is an arrangement/remix of Celestial Symphony from Black Myth: Wukong.

Video: https://www.youtube.com/watch?v=jFj7pas8KlI

This song is an arrangement of 恋色マスタースパーク from Touhou Project.
原曲：恋色マスタースパーク