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Mo Dao Zu Shi (魔道祖师) / The Founder of Diabolism

Often listed as part of the "Study at Gusu" or "Cold Pond" sequence in the first season. gateanime-com-mdzswp-07-720hd-mp4

Available in many regions under the title The Master of Diabolism . Mo Dao Zu Shi (魔道祖师) / The Founder