Heaven-Defying Comprehension: In Shushan, I Prove the Dao as an Earthly Sword Immortal

After transmigrating as the sect's senior disciple, he's sent to the Demon Tower from the start? In the tower's millennium-long, desolate solitude, Su Yu raises a hand and brushes the dust from an ancient stone stele. [Host carefully studies the inscription and activates heaven-defying comprehension, instantly mastering a cultivation technique: Azure Cloud Sword Art!] With the heaven-defying comprehension System, Su Yu begins having epiphanies every day! [Host sweeps the floor and remarks that falling leaves herald autumn, instantly mastering a cultivation technique: Lion's Heaven-Turning Seal.] [Host drinks tea and seems to gain insight, instantly mastering a cultivation technique: Dragon-Elephant Limitless Art.] ...Eighty years in the Demon Tower, a fleeting instant in the world beyond. The myriad demons invade, and the demon race attacks the sect. Su Yu, his black hair now white, walks out of the Demon Tower with a sword in hand. [Host leaves the Demon Tower and triggers an epiphany critical hit, attaining the Dao as an Earthly Sword Immortal!]