Punching My Enemies Into the Ground Counts as Changing Their Fate Against Heaven

Feel-good power fantasy + decisive and ruthless + no female lead.

Zhang Fan had just hit the jackpot: he was sent to a world of immortal cultivation and became a scholar held captive by bandits. When a swordsman attacked the bandits' stronghold, Zhang Fan seized the opportunity, killed the bandits, and changed his fate.

From then on, Zhang Fan set out to help others defy fate and change their destinies. Using the System, he helped others turn their fates around, earning Fate Points to increase his strength.

With one punch, he smashed his enemies and ended their lives, helping them get an early start on reincarnation. That counted as defying fate, too.

When King Yama of the Underworld was reviewing the Book of Life and Death, he discovered that many souls had had their fates altered and died ahead of schedule. Completely baffled, he could only give up investigating in frustration.