The First Step to Immortality: Forget the One You Love

Novels About Protagonists Who Cultivate the Path of Ruthlessness, Like the Heavenly Way of Forgetting Emotions

No female lead. The protagonist cultivates the Dao of detachment from emotion. Looking for novels with techniques like Supreme Forgetfulness.

A Lone-Wolf Protagonist Who Helps No One, Is Cold-Blooded and Merciless, and Has a System

Invincible and Unfazed, with No Female Lead, Observing All the Ways of the World

If he is invincible, then his horizons should be higher. He should not have to act childish around every insignificant nobody. Of course, if someone rubs him the wrong way, he should not hold back, but why be so wishy-washy? Wouldn't it be better to act decisively? The protagonist should neither be bloodthirsty nor a naive saint. It is enough for him to stand above worldly concerns...

No Female Lead or Romance, Ruthless and Decisive, Dark Stories with Lone Wolves

Please recommend stories that meet all of these criteria: no female lead, no romance or romantic tension, no saintly protagonist, ruthless and cold-blooded, decisive in killing, with a powerful protagonist and plenty of satisfying moments, no burdensome sidekicks, and a lone-wolf protagonist. Any genre is fine! Preferably an evil faction and a dark story, but if not, that's fine too.