How to open the map of hidden mine ruins in dungeons and warriors?

Lan Zhisen hides the map, dark thunder ruins, recommended grade 17~20. Because the monsters in the dungeon are mainly zombies with long blood, high attack and slow movement, it is also called zombie map, which is a good place to experience and practice skills. Many plots and job-changing tasks also involve this map.

Because this is a hidden map, it will not appear on the map of Grangiessen in general, but players need to complete a series of tasks to open it. Let me briefly introduce the mission strategy of opening this map.

1. When the player reaches the level of 15, he can get the task "Strange Stone" from the NPC Xinda marked in the red circle, and take the task props to the NPC Norton (decomposition merchant) marked in the green circle to complete the task and get 1500 gold coins.

2. Then you can receive a research task from Norton, and you will be asked to get eight cat demon nails. In the six dungeons marked by the blue circle, the killing cats and demons were all dropped (pay attention to the white cats and poisonous cats), and the drop rate was good. If you are prepared before coming, you can hand in the task directly and get 1500 gold coins and a dark resistance necklace.

3. Write back. At this time, you can receive the last task, "Dark Mine Relics". The description of the task is not very clear. Let you go to the dark mine ruins to retrieve his hammer (I inexplicably finished it, as if after killing the owner of the difficult dark mine ruins). After receiving the task, you can come to Granson. Well, you can see the hidden map-the remains of hidden mines.