Nietzsche was not as thoughtless as to enthrone ‘will’ absolute efficacy.
He expressed a hint of materialism in his thought.
He was also not as vulgar to think intellect meant purely positive consciousness.
Against him (Schopenhauer) I offer these propositions: first, in order for willing to come about, a representation of pleasure or displeasure is needed. Secondly, that a violent stimulus is experienced as pleasure or pain is a matter of the interpreting intellect, which, to be sure, generally works without our being conscious of it (uns unbewußt); and one and the same stimulus can be interpreted as pleasure or pain. Thirdly, only in intellectual beings do pleasure, pain, and will exist; the vast majority of organisms has nothing like it.Nietzsche, The Gay Science, translated by Josefine Nauckhoff