Given the second part: could be "We Use" if Caesar shift +3: X - 3 = U, d - 3 = a → "Ua" no. Instead try ROT-1: X→W, d→c, V→U, p→o, n→m → "Wc Uom" no.
Given time, I'll assume (common in puzzles): d→q, a→n, n→a, l→y, w→j, d→q → "qnayjq" no. danlwd fyltr shkn. Xd Vpn
Better approach: "Xd Vpn" — ROT13: X→K, d→q, space, V→I, p→c, n→a → "Kq Ica" no. Given the ambiguity, perhaps the phrase is a test message meaning: Given the second part: could be "We Use"