You can get the Dragoncrest Shield Talisman at the Bestial Sanctum. You can get here by travelling through Caelid or by using a teleport in the small lake north of the Third Church of Marika ...

From the Dragon Temple Altar Site of Grace, head to the door to the north, and once outside, turn left and reach the wall at the back. Head to the ledge and drop to the zone below; there's an ...