An Artifact?

In the Principal's House,

"Aether?" Celestia's voice carried a note of curiosity and concern as she watched him bring in an unusual object.

It was roughly the size of a palm and shaped like an 'X', with each of the four ends housing small black crystal balls.

At the centre rested a larger yellow crystal!

She couldn't hide her curiosity as Aether carefully placed the artifact on the table. "What is that?" she asked, her eyes widening in surprise.

"It's the artifact that was used to trap Aqua," Aether replied, his expression turning serious as he scrutinized the object.

The memory of Aqualina trapped within the dome, her powers nullified, flashed through his mind. This device had rendered everyone inside powerless, cutting off their access to Arcane energy.

He had obtained this artifact during the Capture the Flag event, while he was seducing Aqualina.