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

Location: ein_fild08 192,49

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)
• Amplification Blueprint
• 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 found inside the Mjolnir Underground Caverns.

Monster	Monster ID	Type	Location
Renire	21955	MVP	Mjolnir Underground Caverns

Only Renire can drop the original Einbech base weapons listed below.

Important: Renire is an MVP monster, so only one Renire may be present on the map at a time. Players may need to search the cavern or wait for Renire to respawn.

Base Weapon Drops

Renire can drop the following original Einbech weapons:

No.	Base Weapon	Item ID	Matching Amplify Blueprint	Weapon Drop Rate
1	Metal Detector MK47 [2]	28771	Amplify (Metal Detector MK47)	0.50%
2	Jewel Detector MK47 [2]	28772	Amplify (Jewel Detector MK47)	0.50%
3	Safety Saber [2]	13493	Amplify (Safety Saber)	0.50%
4	Safety Foxtail [2]	550006	Amplify (Safety Foxtail)	0.50%
5	Blocking Spear [2]	32018	Amplify (Blocking Spear)	0.50%
6	Claw Sword [2]	21050	Amplify (Claw Sword)	0.50%
7	Rubber Hammer [2]	16088	Amplify (Rubber Hammer)	0.50%
8	Saw Axe [2]	28140	Amplify (Saw Axe)	0.50%
9	Safety Knuckle [2]	1862	Amplify (Safety Knuckle)	0.50%
10	Safety Manual [2]	32350	Amplify (Safety Manual)	0.50%
11	Welding Wand [2]	26162	Amplify (Welding Wand)	0.50%
12	Detecting Staff [2]	2058	Amplify (Detecting Staff)	0.50%
13	Grinder Huuma Shuriken [2]	13346	Amplify (Grinder Huuma Shuriken)	0.50%
14	Bolt Shooter [2]	18190	Amplify (Bolt Shooter)	0.50%
15	Bolt Crusher [2]	28045	Amplify (Bolt Crusher)	0.50%
16	Bolt Revolver [2]	32303	Amplify (Bolt Revolver)	0.50%
17	Safety Whip [2]	26212	Amplify (Safety Whip)	0.50%
18	Safety Lute [2]	32111	Amplify (Safety Lute)	0.50%

Important Information About the 19th Blueprint

There are 19 Amplify Blueprints, but only 18 unique original base weapons.

The additional blueprint is:

Amplify (Metal Detector MK47-2)

Item ID: 102126

The Metal Detector MK47-2 route uses the existing:

Metal Detector MK47 [2]
Item ID: 28771

Therefore, Renire does not need to drop a separate 19th original weapon. The original Metal Detector MK47 supports both stages of its Flush weapon progression.

How to Create a Flush Weapon

Players must collect:

• The corresponding original base weapon dropped by Renire

• The matching Amplify Blueprint

• Shadowdecon

• Dynite

• Weapon Enhancement Stone (High Grade)

• Mjolnir's Treasure

• Mjolnir's Energy

The original weapon and Amplify Blueprint must match.

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	Source
Detecting Staff [2]	2058	Renire MVP
Amplify (Detecting Staff)	102029	Mjolnir Underground Caverns monsters
Weapon Enhancement Stone (High Grade)	1000432	Enhancement Stone exchange
Mjolnir's Treasure	1001203	Mjolnir Underground Caverns
Mjolnir's Energy	1001204	Mjolnir Underground Caverns
Flush Detecting Staff [2]	640035	Final reform result

Drop Rate Notice

Each original base weapon has a:

0.50% drop chance from Renire

The weapon drops are checked separately. A base weapon is not guaranteed every time Renire is defeated.

Players may need to defeat Renire multiple times to obtain the desired weapon.

Auto Loot Recommendation

Players may enable Auto Loot before hunting:

@autoloot

This helps collect weapons, blueprints, enhancement stones, and cavern materials.

Player Notice

Important: Renire drops the 18 unique original base weapons required for all 19 Amplify Blueprint reform routes. The matching blueprints and crafting materials can be obtained by hunting monsters inside Mjolnir Underground Caverns.

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:

1. Enter Mjolnir Underground Caverns.
2. Defeat monsters inside mjo_wst01.
3. Collect Weapon Enhancement Stone (Low Grade).
4. Travel to rgsr_in 131,187.
5. Speak to the equipment material exchange NPC.
6. Exchange Low Grade stones for Medium Grade stones.
7. Exchange Medium Grade stones for High Grade stones.
8. 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

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

Location: ein_fild08 199,50

Use the following command to locate the NPC:

@warp ein_fild08 199 50

Enchantment Reminder

Before attempting an enchantment:

1. Confirm that the correct Flush weapon is selected.
2. Review the required materials.
3. Remove equipment that should not be processed.
4. Check whether the enchantment can fail or replace an existing option.
5. 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 Summary

• Entrance: ein_fild08 192,49

• Cavern map: mjo_wst01

• MVP monster: Renire

• Renire monster ID: 21955

• Unique original base weapons: 18

• Supported Amplify Blueprint routes: 19

• Weapon drop rate: 0.50% each

• Amplify Blueprints drop throughout the cavern

• Low Grade Weapon Enhancement Stones drop throughout the cavern

• Enhancement Stone exchange: rgsr_in 131,187

• The original weapon and blueprint must match

• A base weapon drop is not guaranteed on every Renire kill

• @whodrops may not display map-specific drops

Quick Player Guide

1. Reach Base Level 250.
2. Travel to ein_fild08 192,49.
3. Enter the Mjolnir Underground Caverns.
4. Defeat monsters to collect blueprints and materials.
5. Obtain the appropriate blueprint for the desired Flush weapon.
6. Prepare Shadowdecon, Dynite, High-Grade Weapon Enhancement Stones, Mjolnir's Treasure, and Mjolnir's Energy.
7. Craft or upgrade the selected Flush weapon.
8. Visit Flush Mk4U at ein_fild08 199,50 for equipment enchantment.
9. Refine and grade the weapon according to the desired build.