You all know the game, and you know it well! And, since it seems Quinny was the last to post in the other thread nearly 9 months ago, I figured it was time to strike up a new one. There wasn't a riddle going on, so I guess it's open for me to make one!

Talk to me, and you will find
I mention what I left behind.
You hear a ding, a chest to find,
the treasure, of the mythic kind.
Talk to me, and you will hear
a challenge; now from there to here.
You cannot win, though you fret;
every success becomes harder yet.

Who am I?