Discovery that the Uppacrombian Amber has been swapped for a fake

What happened

During Marble-Run Building class, Dash became distracted by the earlier fight and suspected the scallywags may have dropped the marble on purpose. He lobbed a Freeze Bomb to freeze Mr. Billfinch and the class, used his Self-Invisibilizer to pass the security guards, and examined the marble with his MTS. The interior was crystal clear with no signature, revealing it was a fake. Dash concluded that the scallywags and Devil-Cat had swapped it during the fight.

Resolution

Dash confirmed the marble on display was a fake and returned to class before anyone noticed, then informed Ellen, Rob and Greta.

The pages