Ji Taoist

No system + no time travel + non-cool story "I know nothing can be accomplished overnight, so I sacrifice everything in my first half of life, just for this long road of cultivating immortals." When soil accumulates to form a mountain, wind and rain arise; when water accumulates to form an abyss, dragons are born; when good deeds accumulate to form virtues, the gods are content and the holy heart is ready. When you accumulate Tao to become an immortal, you will be invincible in this world.