Why do you need the secret medallion of the Holy Tree

The secret medallion will allow you to get to the Sacred Snowfield, from where in turn you can get to the Holy Tree and Malenia, as well as to the Moga Palace. Both locations include battles with the main bosses and will allow you to get two more Great Runes.

To get there, you need to use Rold's Great Lift, which you will gain access to after visiting the capital of the kingdom of Leindell.

But instead of the usual amulet, you need to show the secret medallion of the Holy Tree, consisting of two halves. Find the first half here:

These are the Giant's Peaks, where you will get towards the end of the game. The medallion is located in the back part of the castle of Sol, so you will have to fully explore and inspect it.

The second half of the sacred medallion of the Holy Tree can be found here:

This is a treeIt is an Albino land that you can access from the east, from the place of grace Liurnia Lakeside . Move to the grace of Albino Village , go along the cliff on the right and hit the inconspicuous jug. This is a disguised albino who will give you the other half of the medallion.

With both halves in hand, go to Rold's lift and choose the Show Secret Medallion action:

You will enter the Sacred Snowfield. You need to go to its northern part to find the liturgical city of Ordina. Find the stairs and get over the seals. Inside the city, to the north, there are steps leading to a magical seal. Go downstairs and turn right. Activate the prison. Now you need to activate 4 towers in the prison world. Look for the first one in the center, for the second one, climb the same stairs that you used to get over the magical barriers. From the second on the roofs, get to the third, in the middle of the city??. Finally, to the west, look for a building with a staircase that leads to the fourth altar. Light up all four and you will be able to enter the Holy Tree area. Complete this region completely and fight Malenia. It will drop a rune.