By combining Mind 3, Spirit 3, and Prime 2, the mage can assault the entity’s psychic essence, as described under

Story-wise, this form of spirit-wrack usually involves calling upon holy and/ or unholy powers, ancient pacts, or other sources that attack the spirit’s sense of self. In extreme cases (with lots of successes), it may even drive a spirit insane… that is, if you really want an insane spirit who’s also angry at you afterward! Such spirit-wrack techniques sidestep the usual rule about mental attacks and spirit-beings, because such rituals have been specially formulated to work against those entities.