Martial Arts System - Chapter 50.1: Sleepless Night Part 1.

Forcefully brought over from the modern world to an alternate world, Wang Chong felt detached and lived his life aimlessly.

However, when calamity struck and he saw his family and everything he cared for being torn apart, he felt regret.

Thus, he stood up and eventually became the Grand Marshal of the Central Plains, leading an army against those who seek to destroy all he cherished.

Yet, despite all his efforts, it was already too late to reverse destiny.

But before his death, a shooting star, the same one which brought him to this world, appeared before him, and he was given another chance to undo his regrets.

- Description from Novelupdates

Ruins stretched across the landscape in the apocalypse after the nuclear war.

He had four disobedient disciples, who now achieved success, won recognition and established their own sects.

The embarrassing thing is that it was him who drove those four out of his sect to make them independent.

But one day he had an incident and lost his cultivation. His life was hanging by a thread. Wandering around, he walked into his third disciple’s territory.

What should I do?

Mountains and seas can be tamed, days and nights can disappear.

Only you, the exceptional you, refuse to give up.

——

A man blessed with fortune, the best in his generation, had an accident and started anew; broken in body but firm in spirit, he now uses his wisdom to guide his evil disciples back to the right path.

Notes :
The title 参商 (Shēnshāng) has two meanings:
1) Constellations Shen (ch. “Three Stars mansion”, eu. Orion) and Shang (ch. “Heart mansion”, eu. Antares), which never appear at the same time.
2) Two friends/relatives who are separated/estranged and irreconcilable.

- Description from Novelupdates

One day, I woke up only find out that I’d become a Demon Lord, an individual responsible for protecting a dungeon. The world I’d been spirited away to was one filled with violence. Gigantic monsters wandered through it and competed with each other each and every day for the right to survive. I had no choice but to strengthen my dungeon’s defenses in hopes of living another day—or at least that was what I’d thought. For some odd reason, I instead ended up spending my days in relaxation and bliss.