With the sound of steel on steel, you and the monster battle in a struggle that would be immortalized by bards, had any been around to see it and had they had a convenient flashlight. Always carry a flashlight, kids. After what seems like hours, the monster loses faith and retreats, leaving you alone in the lair. And you know what? It's not a bad lair. Maybe the best thing to do here is call this your new camp. Frankly a pretty good result, all considered. You definitely won't become the new monster haunting this tunnel. Definitely.