Sitting in a Secret Realm, Cultivating Immortality Seems to Be Quite Simple

He was accidentally locked into a secret realm, and it would take a hundred years before he could be released again. Century? Do my useless four-spirit roots have the appearance of longevity? Even if I survive, my brother can't stand up anymore, the fairy won't smile at me, and I still want to marry a beautiful girl~! Shen Yan began to practice like crazy, no matter what skills, secret techniques, flying swords, magical powers, or alchemy, weapon refining, talismans, formations, all were arranged one by one. A hundred years later, when he was released from prison, he discovered... Hey~ I can really fight!