Quest Name:Secret Fete Book
Prequests:Siblings Love,Lost Princess,Luna Clan and Luna Palace
Requirements:Luna Jade in inventory and Qlaya in Team
Step 1:Go to Hanging Garden(you can go to egypt first and than use vehicle to go to hanging garden)

Step 2:Step in front of the statue/fountain at point X:1644 Y:1490

Step 3:You will be brought to a chamber and keep going until you arrive at the question mark and click a gate to open it.
Step 4:Fight with Berthaud(in this fight you will DIE.He will do 9999 damage on you but you wont spawn)
Step 5:Talk to Qlaya's mom and real fight begins.Berthuad have about 22.5k hp and accompanied by 6 bats about 10k-11k hp each.

Spawns:
Top Left Water:Fire
Berthaud:None
Bottom left Earth:Wind
Top right Earth:None
2nd right Water:None
3rd right Wind:Fire
Bottom right Fire:None
Hope this guide helps you on Qlaya Death Quest :)