Heroes invincible 4 merits and demerits

After killing the others outside,

There is also an enemy hero in the lower right corner of the map. If you look next to it, you will see a red gold mine and the heroic army of the enemy in it.

To get through that purple border gate, you must complete two tasks.

First, after killing the black dragon, you will get a dwarf hammer when you go to the mission house in the middle of the map.

Second, go to another mission room above and hand over the hammer. The people in the room will promise to help you open the border gate, and then you can go in. If you beat him, you can go through the customs.