Before he could finish his words, a ruthless glint flashed across the young Duke's eyes. Spiritual energy gushed out of his body like a river.
A wave that made people feel suffocated also spread out faintly. The surrounding airflow dispersed, making people feel very depressed.
In the next moment, the spiritual energy turned into balls of black substance and wrapped around the young Duke's body, turning him into a large black cocoon.
Following the formation of the black cocoon, the young Duke's eyes also began to change. An extremely brutal and beast-like fiendish gaze faintly emerged from within.
In an instant, the black substance was completely absorbed. The young Duke's body expanded to more than double its original size. Furthermore, he was covered in a set of black armor from head to toe, which was becoming more and more terrifying.