"In the days of yore, knights roamed the land in search of adventure."
Here are a few more examples:
* "Tales of yore are passed down through generations."
* "The castle stood as a testament to a bygone era, a relic of yore."
* "He spoke of the legends of yore, stories whispered by the wind."
Keep in mind that using "yore" will give your writing a very old-fashioned and poetic tone. It's best used sparingly and in contexts where the archaic language is appropriate.