Opal

The 2020 Vivid Voltage Opal is a secret rare Trainer card, illustrated by Naoki Saito. Raw near-mint copies trade around $3.54, while a PSA 10 is modelled near $48.54 and a PSA 9 near $21.54. In its original set it is a chase card — roughly a 1-in-1,500 booster pull (modelled, not official). Opal has 3 other printings in the catalogue.