According to your description, the Troll appears to be carrying a Dekyon Charger: it's a device that recycles energy, but not time.
Krel Tarron in "D'aja Vu"

A Dekyon Charger was an item prominently featured in the 3Below episode, "D'aja Vu," in which the episode revolved around.


Physical Appearance

The Dekyon Charger is a long cylindrical device with blue glowing features.


The Dekyon Charger is a device used to recycle energy, but not time.

When it was in the hands of a trickster Troll named Porgon, he was able to combine his Troll magic with the Akiridion tech to create a disturbance in the time-space continuum, allowing him to reset time.


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