Kuro no Maou - Chapter 506

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

The newly started game is connected to another world.[Dungeon minions have offered sacrifices to the master.]But they keep offering sacrifices.I graduated at the bottom of my class at the academy, and now it’s my turn to become stronger in this other world where I was once banished.

“Sword Cultivators may die standing, but they shall never live on their knees!”Xie Xuanyi fell into the Northern Sea, yet, under the nourishment of the “Undying Spring,” he unexpectedly welcomed a second life.Chronic ailments had faded, and new flames reignited.A single ember can set the fields ablaze.Enchantresses, Sword Immortals, Buddhist disciples... A multitude of demons danced chaotically as a great tide approached, heralding another golden age!In his previous life, his body was frail; in this life, he would refine his body with golden vital energy, achieving indestructible, crystal-clear Vajra bones!If the three hundred flying swords of the past were all broken, then he would forge an entire Sword Qi Cave Heaven!“Talismans, formation patterns, Daoist techniques—I only know so much—”Xie Xuanyi sat alone within a great array, with his former long sword placed across his knees.“Who says the path realized by Sword Cultivators can only be the Sword Dao?”

Xavier Reaper, a high school student, was on a school trip with his classmates, when they encountered a female corpse in the middle of the deserted road. After discussing, or rather, complaining, they decide to move the body to the side of the road so that they can continue on their way.But they're in for a surprise, as Xavier goes to move the body, the corpse glows and suddenly it explodes, taking the whole of the school bus and his classmates.Not knowing what happened, Xavier finds himself chained, filthy, and looking like he hadn't bathed in a month, being transported somewhere in an equally filthy carriage with his classmates.What is going on?(The R-18 is gore scenes, so please be informed. )