I Lay Low from Honghuang to Journey to the West, and Emerged Invincible

Su Yu accidentally transmigrates to the Primordial World. When he wakes up, he discovers that he has become the very first spiritual herb in the world. Then, by another stroke of luck, he activates the strongest Primordial System. From the start, he's bound to the System and obtains a method for devouring and evolving. While others rack their brains, I sign in and evolve. When the Dragon, Phoenix, and Qilin clans face a crisis, I step in to resolve it. When humanity faces extinction, I step in to resolve that too. I am the first spiritual herb under Heaven, and I am also a Great Dao Sage. When I emerge, all living beings are shocked. The Sages are shocked. Even the Heavenly Dao is shocked!