Read the Sword Of The Undying action manhwa in English where modern survivors battle fantasy monsters. Hanbin Ryu suddenly teleports into a brutal world system after his military service. A technical glitch traps him inside a deadly tutorial zone for two decades. This error grants him immense physical strength despite his deceptive low-level status. He finally escapes his isolated prison into a harsh reality. Local factions now hunt foreign otherworlders due to a dark conspiracy. Dangerous enemies ambush him at every turn in this unfamiliar territory. Hanbin is swinging his giant blade while fighting hostile warriors.