MU Season 21

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MU Season 21-1 3rd Update

Faith Corrupted, Sanctuary Fallen: The Sanctuary of Aquilas Elite zone

Event Period: 2026.09.01 ~ 2026.09.22 Before Maintenance (UTC)

Event #1

Buried Treasure in theSanctuary of Aquilas

Event Period: 2026.09.01 ~ 2026.09.22 Before Maintenance (UTC)

  • Uriel's Feather

  • Guardian Elite
    Option Conversion
    Fragment

  • Sealed Armor
    Fragment

  • Golden Crest

  • Elite Guardian
    Upgrade Stone

  • Garuda's Flame

  • Jewel of Harmony

During the event period, the drop rate of special items
ONLY available in the Sanctuary of Aquilas Elite Zone
will be doubled.

During the event period, monster HP in the
Sanctuary of Aquilas Elite Zone will be decreased by 20%
and MIN/MAX Elemental Attack will be decreased by 20%.

Event #2

Maze of Dimensions Double Up!

Event Period: 2026.09.01 ~ 2026.09.22 Before Maintenance (UTC)

During the event period, Maze of Dimensions rewards will be doubled.

  • Maze of Dimensions
    Clear Reward

  • Maze of Dimensions
    League Reward

Maze of Dimensions monster EXP Boost Event BONUS!

During the event period, Maze of Dimensions monsters hunting EXP will be increased by 30%.

Attention

  • Event rewards will not be distributed if abnormal or abusive gameplay is detected.
  • Maze of Dimensions Clear Reward and League Reward will be acquired through the Gremory Case (Hot Key K).
  • Unused event rewards in the Gremory Case will be deleted after 7 days.
  • The first league will be closed with the maintenance on 2026.09.29, and you must log-in within 7 days of the closing date to receive the league reward.

Event #3

Event Maps Double Up!

Event Period: 2026.09.01 ~ 2026.09.22 Before Maintenance (UTC)

During the event period, Chaos Castle, Blood Castle, Group Boss Battle
and Devil Square rewards will be doubled.

Mastery Reward

Attention

  • Event rewards will not be distributed if abnormal or abusive gameplay is detected.
  • Chaos Castle, Blood Castle, Group Boss Battle and Devil Square Reward will be acquired through the Gremory Case (Hot Key K).
  • Only the mastery box applies a double-up event.
  • Unused event rewards in the Gremory Case will be deleted after 7 days.

Event #4

Gemstone Drop Event

Event Period: 2026.09.01 ~ 2026.09.22 Before Maintenance (UTC)

During the event, gemstones dropped from monsters can be collected
and refined into Jewel of Harmony.

Elpis NPC
Location Elbeland(42, 246)

How to refine Gemstone to Jewel of Harmony

  1. Step 1. gemstones can be obtained from monsters above
    level 90 during the event period
  2. Step 2. Refine Gemstone through Elpis NPC in Elbeland (42, 246)
    as a Jewel of harmony

Event #5

Mount & Extract Seed Sphere Event

Event Period: 2026.09.01 ~ 2026.09.22 Before Maintenance (UTC)

During the event period, you do NOT need Jewels
to mount or extract Seed Sphere items!

  • FREE

    Mount Seed Sphere
    to a socket for FREE!

  • FREE

    Extract Seed Sphere
    from a socket for FREE!

Event #6

Artifact Grade Upgrade Event

Event Period: 2026.09.01 ~ 2026.09.22 Before Maintenance (UTC)

During the event, Artifact can be upgraded through Chaos Goblin!