The locations of the three seals of The Thing in the Mountain are as shown below with the mission markers:
To seal the first snow-covered road, just break the nearby deep red stone, pick it up, and then attack the seal.
To seal the second Snow Burial City, you only need to activate the mechanism first, then activate 5 icicles (activate in the order of the fairies' flight) and then defeat 3 ruins guards. The ice will melt and you can enter the cave.
In the cave, we first break the deep red stone we can find, pick it up, and then attack the seal.
Then use fire attacks to melt the ice in the cave as shown below, and then a fairy will appear [Thanks for your enthusiastic comments, the fairy in the ice is random. Melt all the ice in the cave by yourself. That’s it]
There are many caves where the ice looks like this, and you can clearly see it with elemental vision.
The sealed door in the cave will open and the last deep red stone will be there.
Then you can start the fragment
For the third seal, we first found all the fairies and then completed the challenge (I found all the fairies first before completing the challenge. I don’t know if I can do the challenge directly.
Thanks for the enthusiastic comments, as long as you beat the challenge), the seal [barrier] of the fragment will be unlocked, and then you can attack the deep red stone in the picture and pick it up to break the seal.
The other two Red Deep Stones and Fairy Spirits are on the back of the seal as shown in the picture below.
I found that many people are lost, so I will post the route.
First, face the seal and go to the arrow
Then you will reach the location in the picture below. Go forward and there will be a place. Go to the right and there will be a place.
The one on the right is in the middle of a bunch of ruin guards.
In this way, after the three fragments are activated, we can go to the top of the mountain. There is a mission here. You can pick it up and follow the mission guide to find the entrance to the top of the mountain.