Decidueye ex is card #15 of 197 in Obsidian Flames (2023), a Double Rare illustrated by PLANETA Mochizuki. At about $0.99 it is the #42 most valuable card in the set. In an Obsidian Flames booster it turns up about once every 114 packs. 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 Obsidian Flames card list
An ungraded Decidueye ex from Obsidian Flames sells for about $0.99. A PSA 10 is worth more, roughly $3.46 by our estimate, and a PSA 9 around $1.98.
It is a Double Rare, and it shows up about once every 114 Obsidian Flames packs.
PLANETA Mochizuki drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Obsidian Flames booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.