Ether Saga Online devs have added a large group area called "Obscurity". The area allows groups from 6-24 players to adventure together. Obscurity is packed with bosses and phat lewt so read more below:
The land of Obscurity is finally coming for smaller groups to explore if you dare. Large groups of 6 to 24 daring adventurers have been fighting their way into the Obscurity. Obscurity is now redesigned to allow up to 6 players to enter the land of the underworld, but you need a minimum of 4 to enter. You can obtain a map from the Dweller of Vacuity once per day. You can also obtain maps from completing the Pit of Champions. Use the map at the Queen of Amaz to enter the instance.Obscurity has always been a challenge for the protagonists in the Journey to the West, and now you can explore the lands that have terrified even the mightiest of heroes. Obscurity will feature 5 different boss fights to test your skills. Zappah has taken over Obscurity, it is up to you and your party to restore order to the underworld of Obscurity.
Check out some screens at the link above.