Mjolnir Underground Cavernst
Mjolnir Underground Caverns
Explore the underground caverns of Mjolnir, obtain Flush Equipment Blueprints, collect new crafting materials, enchant Flush weapons, and obtain new cards.
Recommended Level: Base Level 250 or higher
Mjolnir Underground Caverns Location
| Information | Details |
|---|---|
| Entrance Map | Einbroch Field 08 |
| Entrance Coordinates | ein_fild08 192 49
|
| Navigation Command | @warp ein_fild08 192 49
|
| Requirement | Base Level 250 or higher |

Players can reach the entrance by entering the following command in the game chat:
@warp ein_fild08 192 49
Monsters inside the Mjolnir Underground Caverns may drop:
- Mjolnir's Energy
- Mjolnir's Treasure
- Dynite
- Weapon Enhancement Stone (Low Grade)
- Other materials associated with the underground cavern
Monsters
The following monsters can be encountered inside Mjolnir Underground Caverns:
- Punch Bug
- Aferde
- Dispol
- Timbers
- Renire
Renire is the MVP monster of the area.
= Renire MVP Base Weapon Drops =
'''Renire''' is the MVP monster found inside the '''Mjolnir Underground Caverns'''.
Renire has a chance to drop the original Einbech base weapons required to create the new '''Flush-series weapons'''.
Important Information About @whodrops
When using:
@whodrops 1000430
the server may display:
Item is not dropped by mobs.
This does not mean the item is unavailable.
The Low Grade Weapon Enhancement Stone is configured as a map-wide drop. Some server versions do not display map-wide drops through the @whodrops command.
Players should hunt monsters inside mjo_wst01 to obtain the stone.
Stone Exchange NPC
Players can exchange lower-grade Weapon Enhancement Stones for higher-grade versions at the equipment material exchange NPC.
Use the following command:
@warp rgsr_in 131 187
Alternative navigation command:
/navi rgsr_in 131/187
Speak to the NPC near these coordinates and select the relevant equipment or weapon enhancement stone exchange option.
Weapon Stone Progression
The Weapon Enhancement Stone progression is:
Weapon Enhancement Stone (Low Grade)
Item ID: 1000430
|
v
Weapon Enhancement Stone (Medium Grade)
Item ID: 1000431
|
v
Weapon Enhancement Stone (High Grade)
Item ID: 1000432
How to Obtain the High Grade Stone
Follow these steps:
- Enter Mjolnir Underground Caverns.
- Defeat monsters inside
mjo_wst01. - Collect Weapon Enhancement Stone (Low Grade).
- Travel to
rgsr_in 131,187. - Speak to the equipment material exchange NPC.
- Exchange Low Grade stones for Medium Grade stones.
- Exchange Medium Grade stones for High Grade stones.
- Use the High Grade stones for the appropriate equipment reform.
Flush Weapon Reform
Flush-series weapon reform requires several materials.
The exact requirements depend on the selected weapon, but commonly include:
- The corresponding original base weapon
- The matching Amplify Blueprint
- Shadowdecon
- Dynite
- Weapon Enhancement Stone (High Grade)
- Mjolnir's Treasure
- Mjolnir's Energy
For example:
Detecting Staff [2] + Amplify (Detecting Staff) + Shadowdecon + Dynite + Weapon Enhancement Stone (High Grade) + Mjolnir's Treasure + Mjolnir's Energy = Flush Detecting Staff [2]
Detecting Staff Example
| Requirement | Item ID |
|---|---|
| Detecting Staff [2] | 2058 |
| Amplify (Detecting Staff) | 102029 |
| Weapon Enhancement Stone (High Grade) | 1000432 |
| Mjolnir's Treasure | 1001203 |
| Mjolnir's Energy | 1001204 |
| Flush Detecting Staff [2] | 640035 |
The player must have the base weapon, matching blueprint, and all required materials before performing the reform.
Auto Loot Recommendation
Players may enable Auto Loot while hunting:
@autoloot
To target the Low Grade stone specifically, use the available item-targeted Auto Loot command supported by the server. The item ID is:
1000430
New Items: Flush Equipment Blueprints
Blueprints are used to create or strengthen weapons belonging to the Flush Equipment series.
Available Blueprints
- Amplify (Metal Detector MK47)
- Amplify (Jewel Detector Mk47)
- Amplify (Safety Saber)
- Amplify (Safety Foxtail)
- Amplify (Blocking Spear)
- Amplify (Claw Sword)
- Amplify (Rubber Hammer)
- Amplify (Saw Axe)
- Amplify (Safety Knuckle)
- Amplify (Safety Manual)
- Amplify (Welding Wand)
- Amplify (Detecting Staff)
- Amplify (Grinder Huuma Shuriken)
- Amplify (Bolt Shooter)
- Amplify (Bolt Crusher)
- Amplify (Bolt Revolver)
- Amplify (Safety Whip)
- Amplify (Safety Lute)
- Amplify (Metal Detector MK47-2)
Common Blueprint Materials
Most Flush equipment blueprints require a combination of:
- Shadowdecon
- Dynite
- Weapon Enhancement Stone (High Grade)
- Mjolnir's Treasure
- Mjolnir's Energy
Important: Material requirements may differ between weapons. Players should verify the required quantities through the relevant in-game crafting NPC before exchanging materials.
New Materials
| Material | Usage |
|---|---|
| Mjolnir's Energy | An energy source obtained from monsters in the Mjolnir Underground Caverns. Used for Flush Equipment crafting and enhancement. |
| Mjolnir's Treasure | A treasure found beneath Mjolnir. Used as a crafting material for Flush Equipment Blueprints. |
| Shadowdecon | A high-grade material required by several Flush Equipment Blueprints. |
| Dynite | A crafting material required when creating or upgrading Flush weapons. |
| Weapon Enhancement Stone (High Grade) | A high-grade weapon material included in Flush Equipment crafting requirements. |
NPC Equipment Enchantment
Flush-series weapon enchantment is handled by the Flush Mk4U NPC.
| Information | Details |
|---|---|
| NPC Name | Flush Mk4U |
| Map | Einbroch Field 08 |
| Coordinates | 199,50
|
| Navigation Command | @warp ein_fild08 199 50
|
| Purpose | Flush weapon enchantment |

Use the following command to locate the NPC:
@warp ein_fild08 199 50
Enchantment Reminder
Before attempting an enchantment:
- Confirm that the correct Flush weapon is selected.
- Review the required materials.
- Remove equipment that should not be processed.
- Check whether the enchantment can fail or replace an existing option.
- Keep enough inventory space for returned items.
New Flush Weapon Series
The Flush Weapon Series consists primarily of Level 250, Weapon Level 5 equipment designed for expanded classes and fourth jobs.
| Weapon | Type | Main Class |
|---|---|---|
| Flush Metal Detector Mk47 [2] | Dagger | Shadow Cross |
| Flush Jewel Detector Mk47 [2] | Dagger | Abyss Chaser |
| Flush Safety Saber [2] | Sword | Biolo |
| Flush Safety Foxtail [2] | One-Handed Staff | Spirit Handler |
| Flush Blocking Spear [2] | Spear | Imperial Guard |
| Flush Claw Sword [2] | Two-Handed Sword | Dragon Knight |
| Flush Rubber Hammer [2] | Mace | Cardinal |
| Flush Saw Axe [2] | Two-Handed Axe | Meister |
| Flush Safety Knuckle [2] | Knuckle | Inquisitor |
| Flush Safety Manual [2] | Book | Sky Emperor |
| Flush Welding Wand [2] | Staff | Soul Ascetic |
| Flush Detecting Staff [2] | Two-Handed Staff | Arch Mage |
| Flush Grinder Huuma Shuriken [2] | Huuma Shuriken | Shinkiro / Shiranui |
| Flush Bolt Shooter [2] | Bow | Windhawk |
| Flush Bolt Crusher [2] | Katar | Shadow Cross |
| Flush Bolt Revolver [2] | Pistol | Night Watch |
| Flush Safety Whip [2] | Whip | Trouvere |
| Flush Safety Lute [2] | Instrument | Troubadour |
| Flush Metal Detector Mk47-2 | Dagger | Shadow Cross |
General Upgrade Bonuses
Flush weapons commonly provide additional effects at these refinement levels:
- Refine +7: Additional attack, magic attack, attack speed, or casting improvements.
- Refine +9: Additional skill damage and damage against enemies of different sizes.
- Refine +11: Further skill damage and global cooldown reduction.
- Grade D: Commonly provides P.Atk or S.Matk.
- Grade C: Commonly improves the weapon's supported skills.
- Grade B: Commonly improves damage against enemies of different properties.
- Grade A: Commonly provides another increase to supported skill damage.
Note: Exact effects are different for every weapon. Always check the in-game item description before refining, grading, enchanting, or trading a Flush weapon.
New Cards
New cards may be obtained as part of the Mjolnir Underground Caverns content.
The card effects include bonuses related to:
- Wind-property magic damage
- Holy-property magic damage
- Long-range physical damage
- Melee physical damage
- ATK percentage
- Refine-based bonuses
- Card set bonuses
- Additional SP consumption in exchange for stronger effects
Players should check each card's in-game description before inserting it into equipment.
Warning: Card removal may require special materials or NPC services. Confirm the equipment and card combination carefully before compounding.
Quick Player Guide
- Reach Base Level 250.
- Travel to
ein_fild08 192,49. - Enter the Mjolnir Underground Caverns.
- Defeat monsters to collect blueprints and materials.
- Obtain the appropriate blueprint for the desired Flush weapon.
- Prepare Shadowdecon, Dynite, High-Grade Weapon Enhancement Stones, Mjolnir's Treasure, and Mjolnir's Energy.
- Craft or upgrade the selected Flush weapon.
- Visit Flush Mk4U at
ein_fild08 199,50for equipment enchantment. - Refine and grade the weapon according to the desired build.