Invincible Cultivation System

He was playing a game when he ended up in another world, bringing along the “Invincible Cultivation System”! Weak? Struggling to advance? Ding! Enemy troops will reach the battlefield in 30 seconds. Take them down and your grandpa levels up! Powerful martial skills, but only fragments? System, time to show off. Complete the technique and roll out a brand-new martial skill! Cultivation is dull, and there are no opponents? System, quit slacking and hurry up with those missions. I want to slap faces, trample people, and keep showing off until the very end!