Thmyl Tryf Tabt Kanwn G2410 -

Given the last part — in ROT13: kanwn → xnaja — maybe it’s "kanwn" intended as “kanown” (could be “known” misspelled) — so perhaps the original encoding is reversing words:

Given “g2410” is the key, maybe it’s a (G=4th letter, shift 24 = shift -2):

Atbash (A=Z, B=Y, etc.): t → g h → s m → n y → b l → o → gsnbo (no) thmyl tryf tabt kanwn g2410

“guzly gels gong xnaja t2410” — not English.

If shift -2: t → r h → f m → k y → w l → j → “rfkwj” — no. Given the last part — in ROT13: kanwn

But maybe each word is a scrambled anagram: — could be “mythl” or “thlym”? Unlikely.

“kanwn” might be “known” (k->k, a->n? no). But try reversing each word: Unlikely

If this is from a puzzle hunt, the intended answer might be a word or phrase like: “The walls of Jericho fell” But since your request says “piece” — perhaps you mean a from a larger puzzle? Or the word “piece” as in a fragment?

Let’s break it down: