The Great Dao of Life stood opposed to the Death Great Dao.
If one integrated the Dao with either of these two Great Daos, one could step into the Seventh Order, but that was also the highest realm.
To go a step further, one could only unite life and death, grasp life and control death.
Chen Mobai's Third Senior Brother, whom he had heard preach in Zixiao Palace, had integrated with this Innate Life and Death Great Dao.
After the Life and Death Great Dao was occupied, the Great Dao of Life and the Death Great Dao, in theory, should likewise belong to Third Senior Brother. This was the absolute control an Innate Great Dao held over the Postnatal Great Dao that extended from it. But there were also great powers who took no liking to these, leaving the Postnatal Great Dao empty, or deliberately vacating them for cultivators to integrate with.
For example, the Devil Master used this method to fish.
Of course, there was another situation, such as between master and disciple.
If Chen Mobai's Third Senior Brother transcended, then the Innate Life and Death Great Dao would naturally become vacant. He could have his own disciple integrate with the Great Dao of Life or the Death Great Dao in advance, so that the instant he left, his disciple could immediately advance and take over the Innate Life and Death Great Dao.
This was also something Chen Mobai's teacher had spoken of back in Zixiao Palace.
Because Zixiao Dao Venerable truly was about to transcend, all of his students were watching his two Great Daos, Innate Yin Yang and Innate Taixu, like tigers eyeing prey.
But precisely because of this, in the end, before Zixiao Dao Venerable left, he never vacated the three Postnatal Great Daos of yin,