C3413 Snowy Mountain and Azula

"Elf's Tooth is here, it's in the southwest of Winter Castle. It's just right in front of the statue of Azula, but I heard that there's two giant dragons occupying that place recently. If you guys get there, you better be careful! According to my research, this thing is equivalent to a brain, and can record a lot of things. Also, it starts to open the key to this box