Black-Robed Sword Immortal

Lin Yun failed to survive the calamity in the league’s hottest virtual game “Three Realms”, but accidentally traveled to a world of immortals exactly like “Three Realms” and became an ordinary disciple of Sword Sect.
The fierce battle between the righteous and the devil is in full swing. Lin Yun is in Tianfeng City, which is about to be attacked by the devil, thinking about a question with a confused expression.
How can I survive after the city is broken?