Decidueye is card #SM55 of 248 in SM Black Star Promos (2017), a Promo illustrated by Kouki Saitou. At about $0.38 it is the #249 most valuable card in the set. It is one of 21 Decidueye cards printed so far.
2017Sun & Moon
2019Cosmic Eclipse
2020Darkness Ablaze
2021Shining Fates Shiny Vault
2022Astral Radiance
2023Obsidian Flames
2024Shrouded Fable
2026Perfect Order

















See the full SM Black Star Promos card list
An ungraded Decidueye from SM Black Star Promos sells for about $0.38. A PSA 10 is worth more, roughly $1.90 by our estimate, and a PSA 9 around $0.87.
It is a Promo.
Kouki Saitou drew the art for this card.