Looking for Touhou animation with Shinmyoumaru Sukuna

[ailyn]

I can't for the life of me remember where I saw it, but in the 3D animation, the little woman Shinmyoumaru Sukuna was using the big small hammer against a larger foe. IIRC, there are multiple shrinkings involved and copies of her running around. It's a long shot, but if anyone knows anything - that'd be awesome!