This one can only be reached after unlocking the secret entrance to the nothern snowy region by way of the Secret Medallion. After passing through the dungeon to the Consecrated Snowfield, ride north ...

In the Consecrated Snowfield, you can find the Night's Cavalry set close to the Inner Consecrated Snowfield Site of Grace. From there, you'll see a Carriage being drawn by 2 Trolls to the southwest.

Further north in the Consecrated Snowfield is a large frozen river running from the east up to the northwest. By following the river as it curves north, you'll eventually find a Golden Seed perched on ...