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Excellent Fantasy Novel: After Five Years of Cultivating Immortality in a Cave, I Became Invincible When I Came Down from the Mountain.

I want to read a book like "I practiced immortality in a cave for five years and became invincible when I came down the mountain". Looking for a high-quality fantasy novel that can be compared to "Five Years of Cultivation in the Cave, and I'm Invincible When I Go Down the Mountain"