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[Acheron] Research
Related Links: [Story] - [Shadow Phantom Soldier] - [Mercenary Guild] - [Pentagrams] & [Errtel]
Jump to: [Story] [Quest] list - Repeatable [Quest] list
[Acheron] is a mysterious island, near the continent of [MU], which recently became riddled with unique elemental monsters. NPC [Deruvish], whom can be found camping in [Acheron], came here with members of [Vanert] in search of [Secromicon Fragments]. The elemental monsters were far too strong, forcing [Vanert] to flee. NPC [Deruvish] stayed behind, on the island, to help research the area in order to gain the knowledge needed to fight the elemental beasts.

NPC [Deruvish]
  • Located in [Acheron] (29, 206).
  • Offers [Quests] for characters over [Character Level] [Level 300].
  • He is a member of [Vanert].

  • Required [Character Level]: [Level 300]
  • Recommended [Character Level]: [Level 340]
  • Recommended items: [Iron Shield of the Magic] [+9] or greater.
  • [Difficulty]: Hard


NPC [Deruvish] has studied Acheron greatly, but he is not sure how this all came to be. He knows [Acheron] was once a tranquil place, filled with peaceful spirits of elemental energy. However, something has corrupted them with evil, and now they are hostile and possess physical strength. Most likely, this is [Kundun's] evil doing. The little information known, currently, is that the monsters' special elemental energy can be weakened with [Pentagrams]. [Pentagrams] are an accessory which protect against evil spirits' elemental effects. You will need a [Pentagram] to survive in [Acheron].

Additional Information
  • NPC [Deruvish] offers [Story] [Quests] and repeatable [Quests].
  • All of the [Story] [Quests] must be completed in order to take repeatable [Quests].
  • All repeatable [Quests] have [Character Level] restrictions, which a character must be within in order to be offered that [Quest].


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[Story] [Quest] list
  • After completing all the [Story] [Quests], repeatable [Quests] will be unlocked.

The Only Survivor of the Adventurers
  • [Story] [Part 1]
  • [Task]:
  • Reward:
    • [Elemental Rune] (x1)
    • [EXP] (x200,000)
    • Unlock [Quest]: Acheron's Mysterious Power Element
Additional Info:
  • The item for the [Task] can be of any [Elemental Type].
  • This [Quest] can NOT be repeated.
Acheron's Mysterious Power Element
Additional Info:
  • The [Errtel] reward item will be the same [Elemental Type] as the [Pentagram] item used in the [The Only Survivor of the Adventurers] [Quest].
  • This [Quest] is unlocked after completing the [The Only Survivor of the Adventurers] [Quest].
  • This [Quest] can NOT be repeated.
Errtel Item
  • [Story] [Part 3]
  • [Task]:
  • Reward:
    • [Elemental Rune] (x1)
    • [EXP] (x200,000)
    • Unlock [Quest]: Create Errtel
Additional Info:
  • The item for the [Task] can be of any [Create Errtel].
  • [Mithril] is created by collecting [Mithril Fragments] (x5).
  • This [Quest] is unlocked after completing the [Acheron's Mysterious Power Element] [Quest].
  • This [Quest] can NOT be repeated.
Create Errtel
  • [Story] [Part 4]
  • [Task]:
    • Item: [Elemental Powder] (x1)
  • Reward:
    • [Elemental Rune] (x1)
    • [EXP] (x200,000)
    • Unlock [Quest]: Spirit Survivor Adniel
Additional Info:
  • This [Quest] is unlocked after completing the [Errtel Item] [Quest].
  • This [Quest] can NOT be repeated.
Spirit Survivor Adniel
Additional Info:
  • The [Errtel] reward item will be the same [Elemental Type] as the [Pentagram] item used in the [The Only Survivor of the Adventurers] [Quest].
  • This [Quest] is unlocked after completing the [Create Errtel] [Quest].
  • This [Quest] can NOT be repeated.
Secrets of the Acheron Monsters
  • [Story] [Part 6]
  • [Task]:
  • Reward:
    • [Elemental Rune] (x1)
    • [EXP] (x200,000)
    • Unlock [Quest]: Change of Acheron Island
Additional Info:
  • This [Quest] is unlocked after completing the [Spirit Survivor Adniel] [Quest].
  • This [Quest] can NOT be repeated.
Change of Acheron Island
  • [Story] [Part 7]
  • [Task]:
  • Reward:
    • [Elemental Rune] (x1)
    • [EXP] (x200,000)
    • Unlock [Quest]: Ubaid's Gatekeeper
Additional Info:
  • This [Quest] is unlocked after completing the [Secrets of the Acheron Monsters] [Quest].
  • This [Quest] can NOT be repeated.
Ubaid's Gatekeeper
  • [Story] [Part 8]
  • [Task]:
  • Reward:
    • [Elemental Rune] (x1)
    • [EXP] (x200,000)
    • Unlock [Quest]: Discovery of a New Clue
Additional Info:
  • This [Quest] is unlocked after completing the [Change of Acheron Island] [Quest].
  • This [Quest] can NOT be repeated.
Discovery of a New Clue
  • [Story] [Part 9]
  • [Task]:
  • Reward:
    • [Elemental Rune] (x1)
    • [EXP] (x200,000)
    • Unlock [Quest]: Eliminate Ubaid Elemental Beasts
Additional Info:
  • This [Quest] is unlocked after completing the [Ubaid's Gatekeeper] [Quest].
  • This [Quest] can NOT be repeated.
Eliminate Ubaid Elemental Beasts
  • [Story] [Part 10]
  • [Task]:
  • Reward:
    • [Elemental Rune] (x1)
    • [EXP] (x200,000)
    • Unlock [Quest]: Raid of Elemental Knights
Additional Info:
  • This [Quest] is unlocked after completing the [Discovery of a New Clue] [Quest].
  • This [Quest] can NOT be repeated.
Raid of Elemental Knights
  • [Story] [Part 11]
  • [Task]:
  • Reward:
    • [Elemental Rune] (x1)
    • [EXP] (x200,000)
    • Unlocks repeatable [Quest].
Additional Info:
  • This [Quest] is unlocked after completing the [Eliminate Ubaid Elemental Beasts] [Quest].
  • This [Quest] can NOT be repeated.
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Repeatable [Quest] list
  • Repeatable [Quests] are unlocked only after completing the [Story] [Quests].

Devil Fairy Elimination Order
  • [Character Level] restriction:
    • [Level 301] ~ [Level 330]
  • [Task]:
  • Reward:
    • [Zen] (x100,000)
    • [EXP] (x400,000)
Additional Info:
  • Repeatable [Quest]
Elemental Beast Elimination Order
  • [Character Level] restriction:
    • [Level 331] ~ [Level 360]
  • [Task]:
  • Reward:
    • [Zen] (x100,000)
    • [EXP] (x400,000)
Additional Info:
  • Repeatable [Quest]
Elemental Knight Elimination Order
  • [Character Level] restriction:
    • [Level 361] ~ [Level 400]
  • [Task]:
  • Reward:
    • [Zen] (x100,000)
    • [EXP] (x400,000)
Additional Info:
  • Repeatable [Quest]
Ubaid Devil Fairy Elimination Order
  • [Character Level] restriction:
    • [Level 400] ~ [Level 420]
    • [Tier 3] [Character Class] required
  • [Task]:
  • Reward:
    • [Zen] (x100,000)
    • [EXP] (x600,000)
Additional Info:
  • Repeatable [Quest]
Ubaid Elemental Beast Elimination Order
  • [Character Level] restriction:
    • [Level 421] ~ [Level 440]
  • [Task]:
  • Reward:
    • [Zen] (x100,000)
    • [EXP] (x600,000)
Additional Info:
  • Repeatable [Quest]
Ubaid Elemental Knight Elimination Order
  • [Character Level] restriction:
    • [Level 441] or greater
  • [Task]:
  • Reward:
    • [Zen] (x100,000)
    • [EXP] (x600,000)
Additional Info:
  • Repeatable [Quest]


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