The Rain Thunder Dragon, Boyi Dragon and Black Flame Octopus in "Monster Hunter: The Wilderness" are relatively rare powerful monsters in the game. If you want to increase the probability of these monsters appearing, you need to go to the tent to rest, 300 guild points at a time, refresh the entire picture, and then specify extreme weather.
How to increase the probability of the appearance of the Monster Hunter in the wilderness of the Thunder Dragon
When there is no main line or monsters want to fight, go to the tent to rest. 300 guild points at a time, refresh the entire picture. You can specify the weather, but you can only specify the picture where you are located. It is recommended to specify extreme weather in the first three pictures, which can ensure the number of appearances of the Thunder Dragon, the Boyi Dragon, and the Black Flame Octopus. These monsters are not specified in the weather.
The black erosion dragon seems to have nothing to do with the weather, unless it is specially designed to brush it later, it is not recommended to stay in the snow mountain to rest.