YOU SAID:

there once was a Knight who slayed a great dragon, but the dragon's family came, and wiped the kingdom clean, leaving the knight horrified

INTO JAPANESE

かつて偉大なドラゴンを殺した騎士がいましたが、ドラゴンの家族がやって来て王国を一掃し、騎士をぞっとさせました

BACK INTO ENGLISH

There used to be a knight who killed a great dragon, but a family of dragons came and wiped out the kingdom and scared the knight.

INTO JAPANESE

かつては偉大なドラゴンを殺した騎士がいましたが、ドラゴンの家族がやって来て王国を一掃し、騎士を怖がらせました。

BACK INTO ENGLISH

There used to be a knight who killed a great dragon, but a family of dragons came and wiped out the kingdom and scared the knight.