Hia Miu Shrine
The Hia Miu Shrine is located at the far northwestern corner of the map, at the northwest portion of the Hebra Mountains.
A Major Test of Strength
The shrine is a Major Test of Strength shrine. Defeat the Guardian Scout IV, who wields a Guardian Spear++, Guardian Sword++, and an Ancient Battle Axe++. Then open the chest to find a Sapphire gem before then speaking with Hia Miu at the altar to get a Spirit Orb.