It was because this world had to go through various cycles.
Whenever the Lord Creator finished an opening, he would need to take some time to digest his gains. By the time he finished doing so, the next batch of beasts would be ready to breakthrough to the Half-Step Transcendent realm!
When this occurred, the Lord Creator's absolute control would collapse. He would force himself into hiding, allowing his machinations to lay dormant until everything settled down. After all, while his cultivation suppression on the beasts worked on dao beasts and below, it was impossible for them to work on Higher Existences. In fact, the so-called second and third phase were actually these suppressions ceasing to work on even dao beasts due to the Lord Creator running out of energy to sustain them!
