Hmm... originally, this was just some bullshit from a storybook, but Jian Cheng was a man with a pure Dao Heart, and he actually did it before his promotion to Saint Heir.
What's even more ridiculous is that he actually managed to defeat everyone across the Hongmeng Realm, suppressing his entire generation. The younger cultivators of his time couldn't hold their heads high; not a single one could compete with him.
This wouldn't have been a big deal on its own, but as he kept fighting, he developed an invincible confidence. Then, within his pure Dao Heart, he came to believe this was truly the momentum of invincibility.
On top of that, he walked the Extreme Dao—specifically, the Extreme Weapon Sword Dao—cultivating a single Flying Sword to the very end. It was the pure extreme of one man, one Sword, and nothing else.
Riding that momentum, he founded his Invincible Sword Domain, became a top-tier Saint Heir, and forged a life of invincibility.
