If one's strength is insufficient, then they will be utterly suppressed, unable to escape at all.
So, for an Earth Immortal to kill a True Immortal is like slaughtering a chicken.
As long as the Cave Heaven Domain is released, it can suppress many True Immortals.
Of course, some powerful True Immortals have special survival skills and can still escape.
"Now, my understanding of the Space Laws has reached more than 20%."
"Once I start to condense a Cave Heaven, it will almost certainly become one."
"But to be on the safe side, I still need to further enhance my understanding of the Space Laws."
Zhou Sui sensed the surface of his Real Fairy Dao Fruit, which was etched with runes of the Space Laws. The more runes that appeared, the deeper his insight into the Space Laws.
Although understanding 10% of the Space Laws allows one to become an Earth Immortal,
that is just stepping into the Earth Immortal threshold.