This was the very Purifying Bottle Zhou Heng had left behind in Present World Space-Time.
After Zhou Heng smuggled himself into Past and Former Times and vanished into the depths of the Space-Time Frontier together with the "Starry Sky Dragon of Star Devouring," Frontier God Lord Boundary Setting had personally gathered it up.
He had brought it back to the Boundless Court and subjected it to a thorough, entirely new erosion and transcendence using the all-polluting black water of the Fated Black River, completely rewriting its original attributes and mechanisms and refining it into a taboo item designed specifically to counter Zhou Heng.
He manipulated the still-emerald Willow Branch on the White River Purifying Bottle (Sea of Stars)...
The Willow Branch trembled gently between his fingertips, scattering drops of an eerie liquid, pitch-black as ink, that exuded the power to erode everything holy.
When the black liquid fell into the void of the Round 40000 Checkpoint, it spread and surged wildly like a drop of thick ink falling into clear water. In an exceedingly short time, it traced out a long black river across the Round 40000 Checkpoint, spanning heaven and earth and flowing with endless grievance and pollution.
It was a projection of the Fated Black River, one of his strongest trump cards for specifically countering the bizarre Eternity Source Species in Zhou Heng's possession.
Then he casually tossed out the White River Purifying Bottle (Sea of Stars), leaving it suspended at the very center of the black river as the central nexus of this specialized countering domain.
Was that the end of it?
No!
Frontier God Lord Boundary Setting slowly raised his eyes, as brilliant as a golden galaxy.
He fully unleashed his Truth Skill, Master's River, which had been enveloping the entire Sea of Stars Lord region