I Am Buzhou Mountain: I Ran Away from the Start, and the Sky Fell

The protagonist transmigrates into the Primordial World. He doesn't become a person or a beast, but the pillar holding up the sky: Mount Buzhou! His true form is vast beyond measure, yet he can't move, forced to watch the Wu and Yao races fight all over his body. Just as he thinks he's destined to be knocked down by Gonggong, as the story goes, the "God-Tier Lie-Flat System" activates!

[Choice One: Stand your ground and withstand Gonggong's charge, maintaining the stability of the Primordial World. Reward: one hundred thousand zhang of Heavenly Dao merit, and your true form advances to a Postcelestial Merit Treasure.]

[Choice Two: Run before Gonggong hits you and let Heaven collapse on its own. Reward: the Chaos Pearl, containing a world of chaos, and one strand of Primordial Purple Qi!]

The protagonist immediately chooses to run! In full view of every mighty being in the Primordial World, Mount Buzhou, which has held up the sky for countless eons, suddenly quakes and transforms into a giant towering into the heavens. It takes off into the chaos, leaving behind only the words: "I'm done with this job!"

The sky collapses, chaos energy pours in, and floods threaten to destroy the world. The Six Saints rush out of seclusion, only to stare at the empty earth and the hole overhead, utterly stunned.

Nuwa: "I... the material I needed to mend the sky, Mount Buzhou, ran away?"

Laozi: "Did he just take my Daoist home, Mount Kunlun, too?"

In the chaos, the protagonist refines Mount Buzhou into his own Dao body and uses the Chaos Pearl to create a world, taking it easy. "What's the rush? I'll come back after you've fixed the sky."

When he returns after attaining the Dao, the Saints are completely dumbfounded. "Are you using our world as a playground?"