Ttbyq Msaryf Mhkr ❲DELUXE❳

Try (a=1..26, shift +13 mod 26):

Check “zfnels” — ROT13 back? That would be “msaryf” — not English. “zuxe” ROT13 → “mhkr”. ttbyq msaryf mhkr

This looks like a simple cipher, likely a (shift cipher) where each letter is shifted by a fixed number. Try (a=1