Prison of the Great Purge!

Only after confirming that there was not a single living soul left in the entire cell...

did the black-robed figure continue downward.

Another round of slaughter followed.

"Animals! You animals!"

A prisoner screamed.

"Even as a ghost, I won't let you go! The blood flowing through my veins belongs to—" Before he could finish, the voice of this criminal, who perhaps possessed an impressive background and bloodline, abruptly cut off. Clearly, his curse would never come true. The black-robed figure merely raised a hand lightly, and his voice was forever trapped in his throat.

At the staircase leading even farther down...

there was once a renowned master of Dark Magic imprisoned within.

When the black-robed figure approached, he stood in the center of his cell, wearing an eerie calm expression. "I knew this day would come—the executioner of the Department of Mysteries."

"A young wizard who passed by earlier already made me realize something was wrong. It seems something really has happened. Tell me, did 'that project' go wrong?"

This master of Dark Magic clearly knew something.

For the first time, the black-robed figure stopped. His hood turned slightly toward him. Magic was surely concealed beneath that pitch-black hood; not even the outline of his features could be seen.

"Looks like I guessed right." The master of Dark Magic revealed a twisted smile. "I knew it. I knew you couldn't control something so terrifying."

"A taboo hidden within legend."

"Ancient history... that was simply more terrifying than death—" This master of Dark Magic was allowed to say a few more words, but since none of them were useful, that was where it ended.

Splat.

The black-robed figure had grown impatient and did not even let him finish. This Dark Wizard, who had once made the entire African magical world tremble