Perhaps it's due to that forbidden spell.
Perhaps it's because the Rat Immortal saw his wife, saved his daughter, and thus let go of the knot in his heart.
In any case, when the Rat Immortal chose to abandon his flesh to become a Bone Relic, using his own soul to replace the Philosopher's Stone to activate the Giant Zero Three, making 'Tai Yi' descend into the Black Prison world, suddenly, at the end of his originally dark and endless magical path, a sliver of light appeared.
He saw and touched the opportunity to break through the shackles of legend.
Like a drowning man at the bottom of the sea, who suddenly finds a rope appearing in front of him, the Rat Immortal grabs it without hesitation and climbs up with all his strength.
This process cannot be completed in a moment.
It might take a day, two days, a month, two months, or even one or two years. But he ultimately found the right path.
However, as he was constantly approaching the Legendary Realm.
