Main Character Hides His Strength

Sungchul Kim reached the height of martial power and now stands alone against catastrophic calamities. Realizing strength alone cannot achieve his goals, he goes into hiding to learn magic from the people he despises most—the Mages. This dark Korean LitRPG classic spawned an entire subgenre of hide-your-strength stories, featuring genuine mystery, strategic depth, and a protagonist forced to confront his own limitations.