Magic Trial: the Magician's Black and White Mask

[Magical Girl's Witch Trial fanfic + half group portrait + horror + genre] On a secret prison island, girls who were judged to have excessive "witch factors" wore numbered tags and lived in a decaying Gothic mansion. They are forced to participate in the cruel trial that starts with "Witch". Ye Ming Moyuan, a magician who can simulate all things with "acting" magic, took the initiative to enter this prison. Wearing a mask with white on the left and black on the right, she walks on the edge of reason and madness: the white of the mask maintains the anchor point of humanity, while the black connects to the indescribable power of the abyss. However, Prison Island is only a facade. When the red sky tears apart reality and the Thousand-Eyed Sun pulses in the inner world, Mo Yuan discovers that this island is actually a crack in the ancient god's dream that erodes reality. The whisper of the silver-haired girl on the throne, the price paid by the nun Hikari Merulu, the truth reflected in the eyes of the warden's owl... All clues point to a conspiracy that spans a thousand years. "Don't understand, don't believe, don't forget the name" - but when she dyed her mask pure black to save others, sacrificing reason for strength, who was the real "witch" in this trial? When the magician personally unveiled the final curtain, the audience was shocked to realize: everyone is an actor, and under the stage, the abyss is opening its eyes. [The introduction is too weak, please move to the text]