danlwd → qnayjq mwwy → zjjl jwan → wjna bray → oenl kampywtr → xnzcljge
d→y, a→v, n→i, l→g, w→r, d→y → y vigry (one word) m→h, w→r, w→r, y→t → hrrt j→e, w→r, a→v, n→i → ervi b→w, r→m, a→v, y→t → wmvt k→f, a→v, m→h, p→k, y→t, w→r, t→o, r→m → fvhk trom danlwd mwwy jwan bray kampywtr
So maybe not ROT13. Given the phrase shape, maybe it's (a→f): danlwd → qnayjq mwwy → zjjl jwan →