Sonically this is just brilliant. A few lines that I enjoyed reading aloud:
Muse, flickering faintly in the distance, -->
the alliteration, but almost moreso the assonance of the /ɪ/.
bring your burning madness near. -->
Continuing the /ɪ/ here is great, and then a new alliteration. The whole first two lines are great.
Crows winged their way across the interlude -->
the IP here really works with the meaning.
the crows crying craven or victory, -->
although I don't quite know what it means (and craven and victory are different parts of speech), it works sonically.
A couple of places you might improve:
• in a gagaku rhythm, her mind elsewhere.
the bolded part feels too telly, and at least partially implied in the first half.
• and dreamt inscrutable
dreams. Mira watched,
inscrutable feels too easy for you. I think you might be able to make get there in a fresher way