Glastheim Challenge Mode

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Another evil presence that Oscar found near Glastheim.

Venture into the hardest Glastheim instance available with a hardness scale 1 to 10.

Speed Run Record

Weekly speed run is an exclusive feature for this instance, that resets every Monday.

All the party members that holds the fastest clearance of this instance will receive follwing on record reset.

6x 6909.pngSilvervine Cat Fruit

The prizes are sent to RODEX.

Party Bonus Treasure

Party Bonus Treasure

Entrance NPC


/navi glast_01 143/288

Speak to Oscar to generate the instance and enter with your party members.

Needs to be level 170+

Merchant NPCs

NPC Info Description


glast_01 141/291

HUGINN2001 is a machine that has Temporal Circlet.


MUNNIN2003 has many weapons that you can exchange.

Enchant NPC


glast_01 137/291

OSC005 can enchant your Temporal Circlet with extra power up to 3 enchants.

Enchant Reset fee

Zeny Reset: 500,000z with 70% Success. On failure, headgear is destroyed.

Premium Reset: costs 2x 6909.pngSilvervine Cat Fruit with 100% success.

Enchant Fee

1st Enchant Fee: 10x 25867.pngTemporal Fragment

2nd Enchant Fee Normal: 20x 25867.pngTemporal Fragment

2nd Enchant Fee Special: 2x 25865.pngTemperal Gemstone

3rd Enchant Fee: 2x 25866.pngTemporal Spell

1st Enchant (4th slot) 2nd Enchant (3rd slot) 3rd Enchant (2nd slot)

Normal Enchant

Special Enchant


Enchant Level up

  • After receiving one of Mettle, Affection, Adamantine, Master Archer, Magic Essence or Acute on the third enchant you can level it up.
  • Every level upgrade attempt has a chance of failure.
  • If you fail on level 2 or higher, the enchant level will be downgraded by 1 level.
  • If you fail on level 1, you will only lose material and the enchant will remain Lv1.
  • No item destruction on failure.
Enchant Upgrade 25866.pngTemporal Spell Required Success Chance
Lv1 to Lv2 4 30%
Lv2 to Lv3 6 30%
Lv3 to Lv4 8 30%
Lv4 to Lv5 10 30%
Lv5 to Lv6 12 30%
Lv6 to Lv7 16 30%
Lv7 to Lv8 20 30%
Lv8 to Lv9 28 30%
Lv9 to Lv10 40 30%

Instance Tutorial

Step 1


Leader talks to Oscar to select the Pollution Level 1 to 10.

The higher Level the harder instance becomes.

Scale all monsters damage by (Damage * Difficulty Level)
Scale Boss HP by (450,000,000 + [150,000,000 * Difficulty Level]) except for level 10.
Scale Mutated Thorn HP by (5 + [Difficulty Level * 4])
Increases Boss's Health Regeneration mechanic by (300,000 * Difficulty Level) HP per 2 seconds.
More Skills & Mechanics during Boss fight
Increases rewards

TO Unlock Pollution Level, you need to clear the instance. Each clearance gives you 1 Glastheim Challenge Mode achievement point.

Example 100 points to unlock Pollution level 10.


Step 2


When starting, the party can be split into left or right side of the castle.

Clear 50 monsters on the left and 50 monsters on the right side to continue.

Step 3


There are chance that you summon Prime Corruption Root, kill it to receive loots and extra 25864.png at the end.

Depending on the Pollution level the amount of Prime Corruption Root can increase from 1~5.

If you don't kill it in 30 seconds, it will be killed by Oscar and you receive no rewards.

Step 4


Talk to Oscar after done with Corruption Root, then continue following him to the Boss fight.

Step 5


Boss Fight is very complicated and depends on Pullution Level. There is a 5% chance that you will face Phantom Himmelmez

Step 6


After clearing the instance depending on the Pollution level you receive Treasure chest.

Reward Item Pollution Level
Lv 1 Lv 2 Lv 3 Lv 4 Lv 5 Lv 6 Lv 7 Lv 8 Lv 9 Lv 10
25864.pngSealed Temporal Circlet 1~5 1~6 2~7 2~8 3~9 3~10 4~10 4~10 5~10 5~10
25865.pngTemperal Gemstone - - 1~3 1~4 1~4 1~5 2~5 2~6 2~6 2~7
25866.pngTemporal Spell - - - - 1~3 3~7 5~11 8~16 11~22 14~28
25867.pngTemporal Fragment 1~15 1~20 1~25 1~30 2~30 2~30 3~30 3~30 4~30 4~30
6755.pngContaminated Magic 1~3 2~5 3~6 4~7 5~8 6~9 7~10 8~11 9~12 10~13

Boss Fight Mechanism Explained

Mechanism Description
Party Counter
  • Before selecting the difficulty level, Oscar will record how many players are currently inside the instance. If any party member logs out, dies, or enters the instance late, the MVP will only take 1 damage for all attacks.
  • This effect go away when all party members are alive again.
  • If all party members are dead for more than 5 minutes, the MVP will despawn and Oscar appear again.
  • You can summon the MVP again by talking to Oscar.

Fighting Arena

  • If the MVP moves away from the center fighting arena, Oscar will announce that the MVP must be brought back to the arena within 30 seconds or the battle will restart.
Health Regeneration
  • The MVP heals passively (300,000 * Difficulty Level) HP every 2 seconds.
Random Party Teleport
  • When the MVP receives a large amount of damage in a short amount of time, it will randomly teleport all party members within the Fighting Arena. The threshold value for this to occur will depend on difficulty level.

Grand Darkness Grid

  • When Mutated Thorn appears triggers after the Boss HP under 90%
  • Kill the thorns fast, or it will cast Grand Darkness for a period of time.
Many more skills
  • You need to figure out yourself with your party.


Instance Monster

Monster Name Rare Drops

Cursed Raydric

Cursed Raydric

Mutated Raydric Archer

Mutated Raydric Archer

Mutated White Knight

Mutated White Knight

Mutated Khalitzburg

Mutated Khalitzburg

Prime Corruption Root

Prime Corruption Root

Phantom Amdarais

Phantom Amdarais

Phantom Himmelmez

Phantom Himmelmez