TIME-LIMITED GHOST

THE MOUNTAIN was killing them.

Geun saved the Mountain Spirit, his mother, from the shaman that she fought earlier.

However, leaving the mountain proved to be difficult.

Entities that had a grudge against the Mountain Spirit took this opportunity to attack them. Since the Mountain Spirit lost to a shaman, his mother, unfortunately, lost the respect of the beings it used to command.

And now, they had become the target of the ghosts and entities in the mountain.

[They probably want to either eat the Mountain Spirit to gain more power, or kill her to take her place as the mountain's leader.]

Geun could have left the Mountain Spirit and saved himself.

However, the weird sense of filial duty he had stopped him from abandoning his "mother."

[I have to fight.]

Geun left the Mountain Spirit next to the waterfalls. It was the area where his power had most influence in. Hence, he hid his mother there.