Diancie-EX is card #XY43 of 211 in XY Black Star Promos (2013), a Promo illustrated by 5ban Graphics. At about $11.13 it is the #144 most valuable card in the set. It is one of 15 Diancie cards printed so far.
2013XY Black Star Promos
2016Fates Collide
2017Burning Shadows
2019Hidden Fates Shiny Vault
2020Vivid Voltage
2023Crown Zenith Galarian Gallery
2024Stellar Crown
2026Ascended Heroes

















See the full XY Black Star Promos card list
An ungraded Diancie-EX from XY Black Star Promos sells for about $11.13. A PSA 10 is worth more, roughly $89.04 by our estimate, and a PSA 9 around $31.16.
It is a Promo.
5ban Graphics drew the art for this card.