From the thumbnail, I thought the danmaku WAS her wings.

I wonder if that has not been done yet?

禁忌「カゴメカゴメ」
Taboo "Kagome, Kagome"

Though the big bullets should be yellow...

Really, i cannot recall any spellcard from her like this...

Artist claims that this is

秘弾「そして誰もいなくなるか？」
Secret Barrage "And Then Will There Be None?"

But that doesn't use any big bullets that I recall...

Artistic freedom...

There are big bullets in fan-made powered-up version.