New Dungeon: Loop of Circulation

• Complete the last Epic quest before the final Scenario dungeon in each region, and the Loop of Circulation dungeon for the region will be unlocked.
• The Loop of Circulation requires 8 Fatigue per entry. You cannot enter this dungeon if you do not have enough Fatigue.
• The Loop of Circulation randomly generates a dungeon excluding the Scenario and final map of the corresponding region.
• The Boss monster drop an additional item, including Unique equipment.
• Gabriel's Shop randomly appears, offering you a chance of buying Level 1 - 80 tradable Legendary Accessories.

• Secret Village (Lv. 47 - 50)
  
  

The secret passageway that the thieves of North Myre used led to a small, unknown village that was safely out of the Epidemic's way. 
Still, the villagers were worried about the deadly plague, so they closed down all the paths to their village. 
But they didn't know an infected rat came through a narrow passageway that they overlooked.
- Available Dungeons: Verderia, Brigand City, Hamelin, and Blood Sands
- Available Boss Monsters: Michelle the Telekinetic (Verderia), Hound Master Myojin (Brigand City), The Mad Piper (Hamelin), and Moth Queen (Blood Sands)

• Spirit Forest (Lv. 51 - 53)
  
  

Legend says this ancient forest of spirits overflows with vitality and magical power, and it cannot be seen by humans. 
Once every few years or so, an unfortunate traveler wanders into the forest and is driven out by the angry spirits. 
Such travelers find themselves standing outside the forest with no memory of getting there, 
but they are left with a small gift in their bag that is from the spirits and cannot be found in the human realm.
- Location: Mirror Arad > Silver Crown > Abnova
- Available Dungeons: Luteon, Frozen Luteon, and Glassfey
- Available Boss Monsters: Flame Princess Stera (Luteon), Ice Fairy King Zeluth (Frozen Luteon), and Trillion Prism (Glassfey)

• Underground Waterway (Lv. 55 - 57)
  
  

This underground waterway leading out of the Sewer was built by Hendon Myre's greatest architect. 
That's why it survived the ground-shaking impact of the Great Metastasis. 
It used to deliver water everywhere in Hendon Myre, but now it's overrun with monsters.
- Location: Mirror Arad > Sewer > Meltdown
- Available Dungeons: Mushroom Garden, City of Spores Salif, Rotting Lot, and Old Streets
- Available Boss Monsters: Kaijin Shaito (Mushroom Garden), Namulun Merina (City of Spores Salif), Black Moss (Rotting Lot), and Red Hand Busley (Old Streets)

• Sky Islands (Lv. 60 - 62)
  
  

The gravitational field caused by the Great Metastasis sent patches of land and bodies of water soaring into the sky. 
Now, numerous islands float around the Inverted Waterfall, and sometimes Behemoth is sighted swallowing them. 
It's not known why it eats these islands. The GBL librarian thinks it's so that it can ingest their gravitational fields.
- Location: Mirror Arad > Behemoth > Inverted Waterfall
- Available Dungeons: Shark Habitat Durban, Reef of Disgrace, Forbidden Shrine, and Dendroid Hub
- Available Boss Monsters: Gigalodon (Shark Habitat Durban), King Merman Ture (Reef of Disgrace), High Priest Aslor (Forbidden Shrine), and Centaur (Dendroid Hub)

• Mount Hardt (Lv. 65 - 70)
  
  

Mount Hardt, surrounding Ghent like a folding screen, has long been an important strategic point. 
Now that Empyrean's civilian war is close to its end, whoever occupies the mountain might win the war.
- Location: Empyrean > Capital Island > Ghent > Antwer Canyon
- Available Dungeons: Ghent Outskirts, East Ghent Gate, South Ghent Gate, North Ghent Gate, Ghent Battlefield, Midnight Assault, and Kartel Supply Camp
- Available Boss Monsters: Arsonist Bentinck (Ghent Outskirts), Riot Captain Shred (East Ghent Gate), GT-9600 (South Ghent Gate), 
Machine-Arm Warjack (North Ghent Gate), Field Commander Babylon (Ghent Battlefield), Felty Martel and Silky Martel (Midnight Assault), and UM-0 Ultimatum (Kartel Supply Camp)

• Ocean Rail (Lv. 72 - 74)
  
  

The biggest obstacle to the operation of the Oceanic Express isn't the pirates or the Kartels: it's unexpected weather changes. 
A sudden rainstorm can send the train off the railroad to some unknown place.
- Location: Empyrean > Capital Island > Bahn Hafen > Oceanic Express
- Available Dungeons: Iron Scale, Runaway West-Bound, and Shrouded Heiz
- Available Boss Monsters: Commodore Cannonhand (Iron Scale), Admiral Von Beornan (Runaway West-Bound), and Jericho Crawford (Shrouded Heiz)

• Boundary of Time (Lv. 77 - 80)
  
  

There are very tiny cracks along the chain of time that connects the past, the present, and the future, and they're called the Boundaries of Time. 
Time is guiding you to the future, but don't let your guard down. 
A Boundary of Time might push you off the track, sending you to an unexpected point in time and space.
- Location: Arad > Suju > City of Shonan > Time Gate
- Available Dungeons: Great Fire, Epidemic, Organization! The Kartel, Confidential Area, Old Screaming Cavern, and Quickening
- Available Boss Monsters: Beast King Umtara (Great Fire), Skull Knight (Epidemic), Sandstorm Varracht (Organization! The Kartel), Cerberus (Confidential Area), 
Kane (Old Screaming Cavern), and Young Skasa (Quickening)

• Control Tower (Lv. 81 - 83)
  
  

The control facility is where the electricity generated from each Power Plant is collected one last time, and it's the most important facility in the Power Station. 
It distributes the generated electricity everywhere in Empyrean and manages the systems of the Power Plant. 
The blueprints of the Power Station show that one has to go through this place to reclaim the Power Plants from Anton's lackeys.
- Location: Empyrean > Etten Industrial Zone > Slaugh Industrial Complex > Power Station
- Available Dungeons: Kore Power Plant, Furtz Power Plant, and Trombe Power Plant
- Available Boss Monsters: Avenging Pit (Kore Power Plant), Reciting Samuel (Furtz Power Plant), and Shuddering Patris (Trombe Power Plant)

• Immortal Corridors (Lv. 85 - 87)
  
  

The main facilities of the Castle of the Dead are connected by passageways made by the power of light, and they're called the Immortal Corridors. 
Gathered light travels through the Corridors, penetrating the Castle of the Dead, and arrives in the Banquet Hall of Light.
- Location: Empyrean > Sea of Twilight > Zelva > Castle of the Dead
- Available Dungeons: Inverted Watchtower, Luke Rinje, Metal Brakium, and Salamander's Furnace
- Available Boss Monsters: Becky (Inverted Watchtower), Giant Argos (Luke Rinje), Metal Gear (Steel Brakium), and Iron Aim (Salamander's Furnace)

• Bloody Lane (Lv. 88 - 90)
  
  

Everything, even essential commodities like power, is scarce in Metro Center. 
Sometimes, strange sounds can be heard coming from deep underground.
The citizens don't take them seriously, thinking it's just Valgur making the noise, but the adventurers are not convinced. 
They've decided to get to the bottom of this strange noise.
- Location: Pandemonium > Central Park > Metro Center
- Available Dungeons: Time Square, Valley of the Half-breeds, Chamber of Terror, and Wind Canyon
- Available Boss Monsters: Transcendent Nornil (Time Square), Gragor (Valley of the Half-breeds), Domina Hailey (Chamber of Terror), and Suparna (Wind Canyon)
- The Blood Lane dungeon's existing reward items (Purification Stones, Terranium, etc.) are retained