To Help Blue Star Rise, I Summoned the Fourth Calamity

Jiang Cun transmigrates into the body of his namesake, Jiang Cun, in another world. The original Jiang Cun was a down-on-his-luck rich kid whose gold-digging girlfriend had drained him of everything he was worth. At the job-classification Divine Stone in the Imperial Capital Academy, the stone unexpectedly shatters when he touches it, and he is classified as a D-rank class changer. His girlfriend then tricks him into swapping lord territories, sending him from the safest D199 to A3, a territory on Blue Star, his original Earth. He later awakens the strongest Lord System and becomes an SSS-rank master of every class. Using a fully immersive game that is one hundred percent lifelike, he summons the Fourth Calamity to Blue Star, joins forces with them to restore the planet's former glory, and turns it into the brightest star in the universe.