The truth of it all was even shittier than you imagined... No, more melodramatic.
The Truth Universe had forged nine Sky-Severing Staffs 41.9 billion years ago, wielding them to punish all things. From then on, it became the ruler of the entire universe.
Then, only a few hundred million years later, True Immortals from the Super Profound Universe invaded and exploited a loophole to seize control of the Truth Nine Seats.
That loophole was... Dao laws.
The Truth Nine Seats had confidently prepared every defense. They opened the Sky-Severing Staffs' defensive field and established diplomatic relations with those True Immortals across the two universes.
The two universes had still been very far apart at the time. No matter what they truly wanted to do, they spoke of diplomacy.
"Attack the distant, glue the near theory."
"When two people are far apart, they can only rub one out."
"But when they are close, they can launch an attack."
The Nine Seats had dared to meet the True Immortals of another universe in the guise of mortals below the seventh realm. Naturally, this was not because they were idiots, but because of absolute confidence.
The programs within the Sky-Severing Staffs had long been written: should those True Immortals dare employ any means of attack against them, they would be instantly obliterated.
Those protective measures were truly airtight. They had exhausted every possibility, encompassing every attack method that Dao laws could produce.
But the Truth Universe had no Dao laws related to soul control and spirit seizure.
The Super Profound Universe did.
The True Immortals of the Super Profound Universe cultivated corresponding transcendent systems. When they synthesized their Dao Fruits, they had also absorbed universal Dao laws of soul control and spirit seizure into them.
This allowed them to use Dao laws nonexistent