Satanophany is a suspenseful, Kodansha-serialized horror manga by Yoshinobu Yamada centered on Chika Amagi, who is confined to a prison island where inmates are trained as assassins. The series, which has over 36 volumes as of 2026, explores the "Medusa Syndrome" and features intense, violent psychological themes. For raw chapter information and community discussions, visit the r/Satanophany Reddit page .