The Black Star isn't afraid of being killed.
Does he really think that those satiated Divine Upper beings would be as weak as when they were waiting outside the Crystal Wall to kill him?
They have ample resources now, and have rebuilt themselves to their peak!
They are prime Divine Upper beings at the level of 2, 1, 0 second Harmonization.
Even their group of Magina is only at 9-second Harmonization, anyone among them can easily kill him instantly.
And the Black Star is considered quite talented.
In his cultivation so far, he's only reached the level of 6-second Harmonization, while those ancient mechas from the Divine Upper are several realms higher than him.
How could he have the courage to act so recklessly?
Does he really think he's a wolf among sheep?
He's just grass among the sheep.
"Black Star, just continue researching your Immortal Elixir, and by the way, cultivate your realm," Professor Wales, being quite sensible, said. "We need to enhance our foundation."
