"You must prove yourselves worthy, as all those who have come before you have failed. You will understand the trials, if you complete them. Or you will die"
For a moment, there is a trace of emotion on his weathered face. Sorrow perhaps, or weariness.
"I am heard without ears, seen without eyes, felt without touch. I am fleeting and eternal, a shadow of a wish, an echo of a thought. What am I?"
The knight stands motionless, waiting for an answer. There is no more explanation, no further guidance. The riddle alone stands as the first test.