Gao Wu Became Invincible from Killing Demons

Lin Yun traveled to a cruel world of cultivation, awakened the ability to improve his cultivation through killing, and also discovered the terrifying truth of this world in adventure after adventure. The higher the cultivation level, the shorter the life span? Are spiritual roots grown by planting? Do they practice by eating their own children? When the monster is no longer a monster, the man is no longer a man, the boy is no longer a boy, and the human hero dies under the sword of justice, where will Lin Yun go...