Episode 17.1 Appear, Illusion! Explore Cor Mission (Main Quest)

1. Once inside the instance, talk to Elena to begin the instances. There would be 4 marks on the minimap that have bombs in them.

2. When you arrived at 1 of the boxes, click it and clear all enemies that spawned, then talk to the NPC beside it.

3. When the old markings are replaced with the new one, go there and talk to Elena. Portal will open to the boss fight.

4. Kill the boss and talk to Elena.

After, you have unlocked the daily instancce, (link Cor Mission).