Su Yu had an apathetic expression. "When you were preparing your illusionary techniques, of course!"
At the time, the Rakshasa had focused its attention on dealing with the other three fighters. When Su Yu woke up from the illusionary technique, the first thing he did was secretly create his clone. His clone then carried the Will-O'-the-Wisp of the Netherworld with it and approached secretly.
Now, Su Yu had succeeded. As the ghost roared ferociously, it was burned into ashes.
Boom—
A defeated groan could be heard.
Su Yu walked to the site of the creature's destruction. When he waved his big sleeves, the ashes dispersed, revealing a grayish-black colored crystal of the size of an egg.
"A Black Crystal?" Su Yu was shocked.
Just like the human being's Dantian, which allowed them to train and gather spiritual energy, ghosts naturally had something similar. For them, it was the Black Crystal.