There is a very powerful item underground, somewhere in the middle of the map. It is guarded by a Chaos Lord and some other units, and this party is set to Guard Area. Thus, it is possible to lure the guards out by a weak unit and then sneak past them, and thus get the item without fighting. Let's agree not to use this trick. Note that a weak stack of indies will be spawned on day 7 close to the river on your side (and another one in my area). You may open the map in the editor to see where exactly it happens. There are some more spawning events, but I don't know the details. Many thanks to Fubarno for creating such a nice map!