What is how to get to malenia?

To reach Malenia, Blade of Miquella, you need to progress through the game to the Mountaintops of the Giants. After defeating the boss in this area, you gain access to the Consecrated Snowfield.

To reach the Consecrated Snowfield, you will need both halves of the Haligtree Secret Medallion. One half is located in the Village of the Albinaurics in Liurnia, held by an NPC disguised as a pot. The other half is found at the top of Castle Sol in the Mountaintops of the Giants.

Once you have both halves of the medallion, go to the Grand Lift of Rold and select the option to "Hoist Secret Medallion" to access the Consecrated Snowfield. From there, you'll need to solve a small puzzle at the Apostate Derelict (involving lighting braziers) to reveal a portal.

This portal leads to Miquella's Haligtree. Progress through the Haligtree, descending through areas like the Haligtree Town and Haligtree Canopy, until you reach the Elphael, Brace of the Haligtree. At the bottom of Elphael, you'll find Malenia's boss room.