Event on Secrets Revealed

Just as the sun hits its peak, you notice a glint in the side of the road. Not knowing what it is, you halt your army and send someone to check it out. The Goblin returns a few minutes later with a sword and a piece of parchment. One look at the sword tells you it's worthless, so you tell the goblin to keep it. But the parchment was different. Opening the parchment, you find that it's a note telling about buried treasures that were hidden somewhere around here. In the bottom corner of the note you see a small map. Getting your bearings, you notice that the treasures are in the valley not too far south of here.