Tayuya manipulates her three Doki with the sound of her flute. Her melody releases materialised spirits, which are actually special chakra sealed inside of the Doki. The materialised spirits are composed almost entirely of mental energy, so the chakra is in an unstable state. Therefore, they crave physical energy, so they hunt for their prey endlessly.
In Tayuya's chracter profile from the Second Databook this technique is called "Revolt of the Demon Mirror" (魔鏡の乱, Makyō no Ran).