While the tournament was undergoing the second bracket of matches, Mariette had set up a plan behind the scenes. After a lengthy argument with Lea, she had decided to not steal the Black Mirror. Instead, she would place the cursed artifact under surveillance, and ensure nobody else would be able to steal the Mirror. Three people were selected as the security task force: Lea, Jelena, and someone who was enshrouded in the shadows of their hiding spot, their identity unknown.

The three arrived in place and saw from a distance that the Black Mirror had not moved from its spot in the back of the winter lodge's dining hall based on the large present box and the Dan clone sitting before it on a chair; the duplicate was wearing a guard uniform, black sunglasses, and was reading a magazine of sorts. However, the three could observe that despite his lax appearance, the clone kept vigilant watch, and wouldn't let anyone approach the present box.

The three had decided on a plan to insert an electronic tracker equipped with a miniature cloaking device on the Mirror, allowing them to follow its movements. However, based on the way Dan's aura resonated, he was capable of detecting anyone using stealth magic. As the three pondered their options, they had a stroke of good fortune: Shamrock Sally approached the Dan clone.
"Hey Dan, do you happen to know about this coin? I found it outside the lodge. Do you know who owns it?" She asked.
Guardsman Dan flipped his sunglasses up and grumbled. "I don't know, and I don't care! Now, move along. I'm not letting anyone come close to this, you know!"

While Dan was distracted by Sally, the task force realized this was their chance: they snuck close enough, and then, using Mariette's portal magic, Lea entered inside the present box silently, aided by stealth magic to hide her tracks. Mariette herself obfuscated her involvement with the scheme by having her comrades surround herself in the audience seating, blocking line of sight to her use of magic.
Thus, Lea successfully planted the invisible tracker on the wooden frame of the Black Mirror, seemingly placed by Dan himself.

"Nope, I haven't seen this before," the stoic Dan duplicate answered once he took a casual look at the coin Sally handed to him.
Sally sighed. "Alright, but...Oh, I know! I'll flip the coin: if it's heads, I can keep it, and if tails, I'll give it away to someone lucky~"

Lea portaled out back to the rest of the task force members, and the anonymous member took out a handheld device with a screen on it; she saw that the tracker was operational, and providing a signal.

"Alright, here goes!" Sally announced, and flipped the coin, launching it into the air. But then, instead of catching it, the coin bounced on the roll, and rolled away to behind the present box.

"Whoops!" Sally exclaimed. "I guess I got clumsy...?" and Dan pouted in irritation. "Alright, hold it right there. I'll get the coin back for you." Dan floated over to behind the present box, and then returned back to Sally holding the coin on his flipper. "Be careful with this thing; you were lucky it didn't roll under the present box."

"Sorry about that, tee hee~ I promise to be more careful."

Sally then began walking away, and Dan sighed. "Alright, what page was I on again..." The clone mumbled as he returned back to his seat.

In the aftermath of the scene, the anonymous girl's expression tightened, and her eyes widened in shock: the signal from the tracker had disappeared.