Advanced Zone and Instances

Ice Castle: Teleport to Ma-Dravas. There is a circle in the lower left corner. Run to it and you will see an altar in the water. Talk to the NPC to enter Ice Castle. After killing 240 monsters, go into the hall, walk to the end and enter the second floor. On the second floor, walk to the end and destroy the sculpture to spawn Ice Queen.
Oke Town: After defeating Ice Queen, click the stone tablet to enter Oke Town.
Abbyss of Despair: From Oke Town, keep going up until you reach the edge of the cliff. There is a door that leads to Abbyss of Despair.
Berkiel Temple: In Abbyss of Despair, go to the bottom hall. Use the materials dropped by the small monsters in Abbyss of Despair to synthesize the Key of Sanctuary to enter. Party required.
Evil Cunabula: Teleport to Malus Ora, cross the bridge and head to the lower left corner. There is a portal that leads to Evil Cunabula. Go to the bottom of the innermost hall, there is a stone tablet. Use the解除结界 scroll sold by the merchant to summon the BOSS in the order: Schreder, Idra, Slade, Matariel.
Hidden Village: Go to the top of the sea and find the commander to teleport.
Three underwater instances: In the center of each of the three circles in the sea, there is an instance. The instance requires a key, which has a chance to drop from Elite monsters. Defeating the small BOSS in each of the three circles will spawn the General BOSS, and defeating the General BOSS will also drop keys.