illustration card from the カドコミ2023 event that you would get if you bought the 単行本 of とある科学の心理掌握 from certain bookstores, scanned and uploaded to /a/ by anon on 2024-09-11.

https://x.com/gouranga_/status/1686342271841751040
https://www.kadokawa.co.jp/topics/10235/
https://desuarchive.org/_/search/image/7Iw-2Ttv7zK1S81G8bxG1g/