The Grim Loop Of Destiny - Chapter 13: Rage.

[You have entered the dungeon at Gwachun Station’s 1st Exit.] When former high school student Kang Woojin finds himself returned back to Earth after being forcibly summoned to a foreign planet for 20 years, he soon finds that Earth is not the same, normal place as he once remembered it to be.

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

After the brutal loss of his beloved grandfather, Liam Hunter embarks on a harrowing journey into the heart of the Dark Forest, known as the Forest of Kyrell, with a singular goal: to gain the strength necessary to honor his grandfather’s memory and to never lose anyone dear to him again. At just ten years old, Liam is thrust into a world of darkness and malevolence, where he endures four grueling years of training and transformation. In this shadowy realm, he is reborn as a fierce warrior, driven by a relentless desire to eradicate every demon and ultimately confront the Demon King, Emrys himself. To achieve his formidable goal, Liam must forsake any emotional connections that could weaken his resolve. The once vibrant and joyful boy is transformed by his trials into a cold and unfeeling combatant, hardened by the harsh realities of his quest. This is the story of Liam Hunter—the last wielder of dark magic—whose journey through darkness and sacrifice will shape him into a force of vengeance and resolve.

Lan Chang’an has gone through two lifetimes of reincarnations, and in the third life, he aimed for stability until reaching the Nascent Soul Realm in hopes of unraveling the mysteries of the Nine Seal Stele. Consequently, he cultivated the Ancient Trees Evergreen Technique, which wielded modest power in return for greater lifespan.

His approach is not one of fearlessly engaging in battles, but of navigating with steady precision and forging meaningful bonds with others.

Throughout his long cultivation journey, he encountered individuals at various stages of their cultivation, including a Decent Faction Head, a Prodigious Beauty, a Giant Demon Lord, an Evil Cultivator, a Thousand-Year Old Demon, and a Puppet Master Pulling Strings From Behind The Scene.

Observing the ebb and flow of the world, witnessing its ups and downs, he unknowingly became a living fossil in the realm of cultivation, akin to an evergreen tree spanning through eternity.

In the world of mortals, the flow of life is steady, shrouded in the illusion of longevity, yet decisions are made decisively, with a clear sense of morality.