Posted on pixiv: https://www.pixiv.net/en/artworks/145787570
Misumaru Tamatsukuri empowering Reimu Hakurei for the day of Misumaru 9th June (6 can be pronounced Mu so taking M, and then 9 is written 九 in Kanji which is slightly different from 丸 (maru) )
Because there is a word saying "The sphere of Misumaru" in Katakamuna-Utahi, the power is described with Katakamuna letters.
From a free image:
Touhou Project Fan Art Disclaimer
This artwork is an unofficial fan creation based on Touhou Project by Team Shanghai Alice (ZUN). It is not affiliated with or endorsed by the official creators.
Artwork by Art_Blue_Liberalism.