Here's round one:
100 Medusas got lost in a dark forest with just 3100 gold and no heroes or towns. They find a tavern and an unguarded object (in the white area below). There are 50 Nightmares and 150 Minotaurs on the way to the only nearby town. What could the object be and how could it help the poor Medusas defeat the enemy and capture that town?