Astral Cycle

Quest intro:

This is available from 12:00 - 24:00 daily and players must enter in teams of 2 or more. There is no limit to the number of challenges. The challenge starts from the beginning each time and the rewards can only be claimed once per week.

Entrance:

You can find the entrance by Deathmask in Town.

Rules:

Battles are all party PvE ones and rewards are reset once per week. Rewards can only be claimed once per week.

You can challenge 2 boss instances each week, and every instance gives 4 rewards.

Boss instances consist of one battle with 3 waves of enemies. Each wave lasts up to 5 rounds.

You can challenge the instances as many times as you want while they're available, but each reward can only be claimed once per week.

Quest rewards:

There are four sets of rewards and each one grants an Advanced Growth Tome.