The Champions Festival (XY176) card can be found in the Xy Black Star Promos set.
Recently sold 3 times and based on those sales is worth around £21.61.
Currently, there is 1 open listing for this card on ebay.
This card sells in the range of £0.01 to £87.05, making it highly volatile.
This Promo card was illustrated by Naoki Saito.