Slytherin's Locket?

Two suits of armor appeared. One subdued Sirius Black, while the other snatched up the little golden box.

Wizet pointed his wand at Sirius Black and traced a smooth S-shaped arc through the air. The Obscurus Core pumped out Ancient Magic Power. "Tergeo-Scourgify!"

The sudden restraint, the loss of the little golden box, and the Ancient Magic: Purification and Soul Cleansing Charm calmed Sirius Black down. He turned to look at Kreacher, who lay unconscious on the floor.

"I..." The armor loosened its hold and stood where it was. Sirius Black's voice was filled with disbelief. "What happened?"

"Was it because of this thing?" He turned to look at the little golden box held by the armor. "Just now, I felt like... I couldn't control myself. I did whatever I wanted..."

"I think so..." Wizet walked out of the room and waved his wand, making the standing armor follow him. "Didn't something similar happen to Kreacher?"

Under his command, the armor strode over and carried Kreacher onto a nearby table.

Sirius Black followed as well. "Wizet, how is he?"

Wizet waved his wand, sweeping it over Kreacher's body. "He's still quite sturdy. He's only fainted... Tergeo-Scourgify!"

He cast the Ancient Magic: Purification and Soul Cleansing Charm again, helping Kreacher rid himself of the malice clinging to him.

"What exactly is this thing?" Sirius Black looked at the little golden box again. "Judging by its design... it shouldn't belong to the Black Family, but it must be just as old."

Wizet flicked his wand lightly, having the armor present the little golden box before him as he carefully examined the strange magical artifact.

The magical artifact was about the size of an egg. By its shape, it seemed to be a locket. Its main body was made of gold, while