My cow ran away

In the mystical fantasy world, Chen Chang'an was confined to the forbidden library as soon as he arrived,
The sky literally started falling from the very beginning.
Fortunately, at that very moment, his system awakened,
All he needed to do was to read scriptures, and he would keep getting stronger.
Thus, with the library filled with various books, a smile appeared on Chen Chang'an's face.
........
[Ding! You've read Daoist Scriptures and gained a level in 'Heaven Opening Law', currently Level 6.]
[Ding! You've read the Secret Manuscript of Ten Thousand Buddhas, gained a level of Divine Skill 'Six Daos of Reincarnation', currently Level 8.]
[Ding! You've read the Secret Records of Demon Gate, gained a level of Divine Skill 'True Demon That Shakes The World', currently Level 7.]
....
[Ding! Due to the Laws of All Heavens being added to your body, embellished with trembling Literary Qi of the Great Dao, you're rewarded with: Become a Saint on the spot!] 
Years later, as time turned everything old, the world above and the world beneath were already in a desperate turmoil, with immortals descending to the mortal world, and gods and demons performed chaotic dances, making the lives of people unbearable.
Chen Chang'an stepped out of his seclusion one day, looking at the heavenly gods and buddhas scattered across the sky.
“I'm not targeting anyone in particular, but everyone here is garbage!”
That day, he swung his sword and parted the heavens, ever since then, Heaven belongs to Heaven, Earth belongs to Earth!
....!
[PS: Extreme mystical fantasy flow, invincible style! Light readers beware!] 

Become a Saint through Studying! Exposed by my little junior sister!

Tian Ji Demon Lord and others asked again.


"Don't wait. The sooner the better!" Yuan Chu Demon Lord said coldly.


As he spoke, he looked towards the Netherworld, his eyes fierce.


All four of the Tian Ji Demon Lords nodded.


Next, the five of them discussed the specifics of the operation. Once the discussion was roughly settled, they each went to their own teams, leading their troops away.


"Master, are we really going to attack the Netherworld tomorrow?"


On the road, a Great Demon of Dao Palace level beside Tian Ji Demon Lord asked confusedly.


In response to this subordinate Great Demon, Tian Ji Demon Lord shook his head.


The Great Demon was bewildered, not understanding.


When the five had discussed the matter, they had not excluded them, so he had heard about the five's plan.


He didn't understand why his own Master would break the agreement of the five and not send troops; he was puzzled.


Chapter 158: Heaven and Earth Change, Six Daos Born, Five Great Demon Lords Plot Human Disaster!_3