A Mahayana Ancestor Transmigrates Back to Earth

[No System + Truly Invincible + Lighthearted + Decisive and Ruthless] First-year college student Yao Zhatian was out on a summer vacation excursion when he accidentally fell into an ancient cultivator's cave dwelling and transmigrated to another world. He cultivated there for six thousand years, endured countless hardships, and reached the peak of the Mahayana stage. Just as he was facing the final lightning strike of his tribulation, Yao Zhatian was struck by it. A flash of golden light appeared before his eyes, and, miraculously, he found himself back in the cave dwelling he'd entered before transmigrating. When he checked the time, he discovered that only a week had passed. What shocked Yao Zhatian even more was that his Mahayana cultivation had come with him! So, on the first day of the new school year, a freshman at the peak of the Mahayana stage enrolled. “What? The Jiang family's ancestor from Luoyang, a mighty Martial Sect, was defeated by Yao Zhatian with just one finger?” “Bad news, Dean! That kid says he wants to spar with you!” “What? Hurry and book me a private jet. I'm going abroad to hide for a few days!” Inside a business office, a middle-aged man hurried to his feet, his face full of alarm. “It's too late, Dean! That kid's faster than a plane!” (New book, please show your support. Be gentle with the criticism, dear readers, sob.)