γουνοῦμαι σε ἄνασσα· θεὸς νύ τις ἦ βροτός ἐσσι·
(Odyssey 6. 149)
I don't understand the which is the function of νῦν here. I have already read the whole entry of perseus for νῦν, but it didn't help. I only found the following uses of νῦν, that perhaps apply to my case, although I don't see how yet:
2. in Ep. mostly as a particle of emphasis, “ἧκε δ᾽ ἐπ᾽ Ἀργείοισι κακὸν βέλος: οἱ ...