Nietzsche and Heidegger determinate the paths that intersect here giving birth to our horizon of questions: Is it possible a thought that resists the temptation of an absolute basis, but also to unbridled fury calculator machination? It is also possible that a thought is put in a position to understand and also to position itself critically in relation to both nostalgic fundamentalisms, and to pure effectiveness and productivity that technoscience imposes on us? It is possible, after all, to distance itself from traditional metaphysics without falling back into naivety anti-metaphysical definitive and safe overcome? Is it still possible to conceive any kind of other metaphysics? From this initial universe of questions we seek to point out that the metaphysics of the will, at least as developed by Nietzsche and psychoanalysis, brings to the fore a dimension strange to the Western metaphysical tradition: the instinctual dimension, this third historically excluded between matter and spirit, body and mind, unity and multiplicity, sameness and difference, setting another metaphysical not reducible to traditional metaphysics, nor simply anti-metaphysical.