MacGuffin
From Jenny Everywhere Wiki
The Metafictional Macaw defined a MacGuffin as “a device which drives the plot forward” while being of no true, discernible importance in itself. In 2019, recognising the Frost King's treasure as one, the Collective of the Retconning Crocodiles tried to get it before the other treasure-seekers, not due to its monetary value but because they believed they could use its power as a “basal trope”, while it would be wasted in the hands of “side-characters”. (PROSE: The Frost King's Treasure)