In the Age of Mu Online server, the Muun system is streamlined for balance and impact, offering 3 core types of Muuns—each designed to enhance your combat performance in distinct ways:
Defense Muuns – boost your overall durability and survivability.
Critical Damage Muuns – increase the power of your critical hits.
Excellent Damage Muuns – amplify the impact of excellent damage strikes.
Across the server, there are a total of 12 unique Muuns, each with custom visuals and effects. These companions are not just static; every Muun can be upgraded up to Level 5, with each level bringing improved bonuses and greater effectiveness in battle.
This system offers a focused, progression-based approach to Muuns—simple to understand, but highly impactful in both PvE and PvP gameplay.
| Torby | BlackBeard | Angry Bulldog | Super Panda |
|---|
 |  |  |  |
| LVL 1 +400 Defense | LVL 1 +400 Defense | LVL 1 +400 Defense | LVL 1 +400 Defense |
| LVL 2 +800 Defense | LVL 2 +800 Defense | LVL 2 +800 Defense | LVL 2 +800 Defense |
| LVL 3 +1200 Defense | LVL 3 +1200 Defense | LVL 3 +1200 Defense | LVL 3 +1200 Defense |
| LVL 4 +1600 Defense | LVL 4 +1600 Defense | LVL 4 +1600 Defense | LVL 4 +1600 Defense |
| LVL 5 +2000 Defense | LVL 5 +2000 Defense | LVL 5 +2000 Defense | LVL 5 +2000 Defense |
| Rio | Snow fairy | Uma King | William |
|---|
 |  |  |  |
| LVL 1 +500 Critical DMG increase | LVL 1 +500 Critical DMG increase | LVL 1 +500 Critical DMG increase | LVL 1 +500 Critical DMG increase |
| LVL 2 +1000 Critical DMG increase | LVL 2 +1000 Critical DMG increase | LVL 2 +1000 Critical DMG increase | LVL 2 +1000 Critical DMG increase |
| LVL 3 +1500 Critical DMG increase | LVL 3 +1500 Critical DMG increase | LVL 3 +1500 Critical DMG increase | LVL 3 +1500 Critical DMG increase |
| LVL 4 +2000 Critical DMG increase | LVL 4 +2000 Critical DMG increase | LVL 4 +2000 Critical DMG increase | LVL 4 +2000 Critical DMG increase |
| LVL 5 +2500 Critical DMG increase | LVL 5 +2500 Critical DMG increase | LVL 5 +2500 Critical DMG increase | LVL 5 +2500 Critical DMG increase |
| Skier | Mummy Boy | Kairuku | Amphasizer |
|---|
 |  |  |  |
| LVL 1 +500 Excellent DMG increase | |
| | LVL 1 +500 Excellent DMG increase | |
| | LVL 1 +500 Excellent DMG increase | |
| | LVL 1 +500 Excellent DMG increase | |
|
| LVL 2 +1000 Excellent DMG increase | |
| | LVL 2 +1000 Excellent DMG increase | |
| | LVL 2 +1000 Excellent DMG increase | |
| | LVL 2 +1000 Excellent DMG increase | |
|
| LVL 3 +1500 Excellent DMG increase | |
| | LVL 3 +1500 Excellent DMG increase | |
| | LVL 3 +1500 Excellent DMG increase | |
| | LVL 3 +1500 Excellent DMG increase | |
|
| LVL 4 +2000 Excellent DMG increase | |
| | LVL 4 +2000 Excellent DMG increase | |
| | LVL 4 +2000 Excellent DMG increase | |
| | LVL 4 +2000 Excellent DMG increase | |
|
| LVL 5 +2500 Excellent DMG increase | |
| | LVL 5 +2500 Excellent DMG increase | |
| | LVL 5 +2500 Excellent DMG increase | |
| | LVL 5 +2500 Excellent DMG increase | |
|