Mu Online Season 8 Guide

Season 8 (2013) is the update that gave Mu Online its elemental layer. Webzen opened the Acheron continent with Alkmaar, Ubaid and Debenter, introduced pentagram items and errtels, launched the Arca War guild siege and the Acheron Guardian obelisk defence, and added Chaos Castle Survival, Illusion Temple Survival, muun pets, Mu Rummy, Pandora's jewel mining and a rebuilt personal store. This guide covers every Season 8 system with the original stats, NPC locations and rewards.

Acheron continent: Alkmaar, Ubaid and Debenter

Acheron is the new end-game continent of Season 8. Players arrive at the Tree of Life safe zone and hunt in Alkmaar and Ubaid; Debenter, added in Season 8 Part 2, is the third and hardest region. Every monster on the continent has an element, so elemental attack and defense from pentagram items matter as much as raw stats.

The Safety Guardian NPC next to the Debenter entrance moves you straight into Debenter (it is unavailable while an Arca War is running). Debenter monsters are stronger than those of Alkmaar and Ubaid and are meant for characters who already have elemental defense.

Elemental bosses

Five elemental bosses spawn every hour in a random Acheron region. They are the main source of the new pentagram items.

Pentagram items and errtel options

Pentagrams are equipped in the new pentagram slot and hold errtels (elemental gems). Season 8 Part 2 added ten new level 300 pentagrams, dropped by the Acheron bosses and from Acheron Guardian rewards. Most of the top-tier ones can only be traded once unless a Tradable Seal is applied.

Pentagram set options

A pentagram can activate up to two bonus options depending on the errtels socketed in it (Wren's Magic Book and Etramu's Skull are excluded):

• Errtel of Anger rank 2, level 3 — pentagram attack +10%, pentagram defense +10% or elemental critical damage +10%.
• Anger R2 L3 + Errtel of Blessing R3 L5 — 5% of defense is added to elemental defense, 1% of damage to elemental attack.
• Blessing R3 L6 + Errtel of Integrity R3 L6 — 5% resistance against the element that counters yours.
• + Errtel of Divinity R3 L6 — 5% resistance against elemental attacks.

Acheron Guardian: defend the Cursed Obelisk

Acheron Guardian is a daily PvE event. At 23:00 server time a Cursed Obelisk spawns in one of Alkmaar, Ubaid or Debenter (it does not run on Wednesdays or during an Arca War). Talk to NPC Leina in Noria or Lorencia and choose "Enter as Acheron Guardian".

Inside you have 30 minutes. The obelisk is protected by hordes of the obelisk's element that keep growing over time; break the obelisk and everyone in the party receives jewel bundles, Ruud and a chance at the new pentagram items. After the obelisk falls there is a one-minute grace period, then all players are moved back to Noria.

Arca War and elemental towers

Arca War is the Acheron guild siege. Obelisks appear in two of the three regions and the guild that controls them wins. With Debenter in the rotation, note that a Debenter victory gives no set-item reward — the prize is the tower buff that the winning guild carries for the following week.

Every tower also grants +5% elemental attack and defense when your equipped pentagram matches the tower's element, and +20% experience.

Chaos Castle Survival (Battle of the Strongest)

Chaos Castle Survival is a monthly free-for-all for level 280+ characters. Registration is free at NPC Mite in Loren Market. Preliminaries run on the 1st–3rd of each month between 18:00 and 23:00; the top 20 of each round move to the main rounds on the 4th and 5th, and the top 10 fight the final on the 6th at 21:00. Each match needs 5 to 70 players: 5 minutes to enter, 1 minute waiting, 10 minutes of fighting.

Points: 1 per monster kill, 2 per player kill, 3 for being the last one standing. Preliminaries pay Jewels of Bless and Soul, the final pays Jewels of Creation, Life and set items. The champion enters the Hall of Fame and receives the Wings of Conqueror.

Illusion Temple Survival

Illusion Temple was rebuilt as a survival league. Relics drop from the Cursed Statue and must be carried to one of ten Occupation Statues; guilds compete in a league and tournament format registered through NPC Mite (85, 136). The winning side receives the same Wings of Conqueror as Chaos Castle Survival.

Tradable Seal and transformation rings

The Tradable Seal lets you sell or trade a limited item one more time. It is applied from the warehouse and stacks up to 255 trades. Seals now also come with set bonuses: equipping a seal together with the Panda or Skeleton pet gives +30% experience.

New accessories from Kalima

Five resistance accessories drop in Kalima 4–7 (Kundun and Medusa drop excellent versions). The resist grows with item level: +0 1%, +1 2%, +2 3%, +3 4%, excellent +3% extra.

Muun pets

Muuns are the new pet system. Each muun has a function (buff), life, grade and level. Life drains while the muun is equipped and can be refilled to 100% with a jewel. Levels are gained by combining two identical muuns, and a muun can be evolved once using its own Evolution Stone.

Mu Rummy minigame

Mu Rummy is a card minigame played with 24 cards numbered 1–8 in red, blue and yellow. Collect 24 Card Pieces from monsters to build a deck, then lay runs of three: a same-colour run scores 50–100, a mixed-colour run 10–60 and three of a kind 20–90.

Pandora's Jewel mining

Buy a Pandora's Pickaxe from NPC Bolo in Karutan for 100,000 zen, then mine the jewel zones in the safe areas of Lost Tower, Tarkan, Aida, Swamp of Peace and Raklion. The pickaxe wears out and is repaired with Jewels of Bless (up to +4, durability 255). Mining goes through five stages and pays out in gift boxes:

Personal store, map, party matching and social features

Season 8 Part 2 rebuilt the personal store: shops are listed in a searchable window, prices can be set in jewels as well as zen, and the store opens with the P key. The map (TAB) became a transparent overlay you can resize with - / + and fade with [ and ]. Party and guild matching (N key) lets you post or join a party without a level limit — it is disabled in event maps and PK characters cannot use it. Screenshots can be posted straight to Facebook and Twitter, and the interface received a broad clean-up.