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!

The Demon Might swept over, engulfing the entire Underworld Sea.


Seeing the raging demonic qi, everyone present immediately became alert.


Their gazes all fell on the direction of the barrier surrounding Immortality Mountain, solemn and earnest.


They knew, the true transformation had begun!


Next moment, from within Immortality Mountain, a thunderous boom resounded suddenly.


Then, from amidst the distant dark clouds, an apparition both terrifying and daunting appeared.


A phantom of the Great Demon that stood tens of thousands of feet tall!


It hovered over Immortality Mountain, surrounded by boundless raging demonic qi.


The energy surged, shaking the boundless void!


"Is this a demon?! Is it the True Demon?!"


Seeing this apparition, the bystanders gasped in surprise.


For this apparition was undoubtedly a True Demon Phantom!


Chapter 89: The Three Great Law Cultivators, the 'True King' Achieves the Dao!_1