I Become Karna With a Million Times Crit System In Mahabharata. - Chapter 89 . Knowledgeable But All Knowing

As a cultivator, Lan Tian never expected she'd been hurled back to the 1970s countryside!Suddenly stripped of her powers, she's surrounded by mud - brick houses and farmland. Facing farming to social quirks with no modern conveniences, she relies on her cultivator's wisdom and resilience.

Qin Chen crossed into Taiyi Holy Land as a sweeper, and at the age of sixteen awakened the system. As long as he signed in at different places, he could get different rewards.

Sign in at the Land of Emperor Ruins and get the world’s No. 1 Chaos Holy Body and the Chaos Emperor Sutra!

Sign in to seal the magic land and get the quasi-emperor soldiers!

Sign in at the Refining Hall and get the God-level Refining Technique!

Sign in at the medicine garden and get the medicine of immortality!

Sign in at the Imperial Palace and get the Emperor-level forbidden magical power ‘Resurrection from the Dead’!

…

Qin Chen thought that he would just sign in silently until the world was invincible.

One day, the relics of the Great Emperor will appear in the Holy Land, all the holy places, families, and ancient dynasties have come, and there will be an unparalleled demon king in the relics, killing countless powerhouses, ruling the world, and wanting to destroy the Holy Land.

In desperation, Qin Chen could only walk out, slapped the Demon King to death, and sighed: “I just want to be a sweeper and sign in silently. Why do you force me to take action?”

- Description from novelbuddy

This is a world where everyone participates in simulations, amidst an eerie apocalyptic setting.Only by performing a Heaven-defying Fate Change in the simulated life can one avoid being consumed by the black mist.Lu Yuan crosses over accidentally and gains an Adaptive Talent, receiving a Divine-level Talent automatically in every simulation!First Life: A modern technology world where Martial Dao is in decline.[Heaven Rewards Diligence]: With every bit of effort, reap a hundredfold reward; even breathing makes you stronger!Second Life: A Magic World, reincarnated as an ordinary skeleton.[Undead Calamity]: Transform into the Undead Dominator, using the Catastrophe Legion to battle against the Abyss Demon!Some Life: Parasitic cultivation, where cultivators are reared by the Insect Race.[Heaven-defying Comprehension]: Deduce the Gu Dao cultivation system, becoming the first Gu Immortal in history!As each Divine-level Talent is activated, the Gods and Demons finally discover in terror…

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