Jewels Guide
Purpose, mechanics and tactics for all MU Online S3 jewels.
Jewel of Bless
Safe upgrade +0 → +6
The safest upgrade jewel. Drag onto any item to raise its level by +1 with 100% success up to +6.
- +0 to +6 upgrades with no failure risk
- Must-have before starting Soul upgrades
No failure chance
Tactics
- Always use Bless first — bring item to +6 before touching Soul.
- Keep bundles for bulk upgrading.
- Never waste Soul below +6 when Bless is available.
Jewel of Soul
Risky upgrade +6 → +9
Upgrades items further but has a chance to fail and drop the item level.
- +6 → +7, +7 → +8, +8 → +9 upgrades
Success Rate
Failure reduces item level by 1. At high levels (+8/+9), the item may drop back to +0 on failure.
Tactics
- Items with Luck are much safer — always prefer them for high upgrades.
- Prepare extra Bless+Soul before pushing +8 or +9.
- Stop at +7 or +8 if jewels are expensive on your economy stage.
- Test rates on cheap items first.
Jewel of Chaos
Core crafting jewel
Required for most Chaos Machine combinations at the Chaos Goblin in Noria. Needed for +10 and above upgrades.
- Crafting Chaos Weapons
- Wing combinations
- +10 and above item upgrades
- Fenrir combinations
- Special item recipes
No failure chance
Tactics
- Never sell all Chaos early — needed for every major crafting step.
- Chaos is often cheaper than Bless/Soul but critical for +10+ upgrades.
- Stock up bundles before attempting high-level upgrades.
Jewel of Life
Improves additional option
Adds or increases the additional option on an item — bonus damage on weapons, bonus defense on armor.
- Increase additional damage on weapons
- Increase additional defense on armor/shields
- Improve other additional options (HP recovery, etc.)
Success Rate
On failure, the additional option decreases by one step.
Tactics
- Use on gear you plan to keep — not temporary items.
- Prioritize weapons for damage, armor/shields for survivability.
- Items with Luck are safer for Life upgrades.
- Only start Life optimization after the item already has good base options.
Jewel of Creation
Crafting & resets
Used in advanced Chaos Machine recipes, fruit crafting and — on this server — required to perform resets.
- Required for resets on this server
- Fruit creation (Strength, Agility, Vitality, Energy, Command)
- Advanced Chaos Machine combinations
- Wings and special crafting recipes
No failure chance
Tactics
- Do not sell Creation jewels early — you will need them for resets.
- Save Command Fruit ingredients if you play Dark Lord.
- Stock up before each planned reset.
Jewel of Guardian
Grand reset & Castle Siege
On this server, Jewel of Guardian is required to perform grand resets. Also used in Castle Siege and special crafting.
- Required for grand resets on this server
- Castle Siege related systems
- Lord Mix
- Special item combinations
No failure chance
Tactics
- Never sell Guardian — it is required for every grand reset.
- If Castle Siege is active on server, Guardian may also have high trade demand.
- Keep a stock ready if you are approaching grand reset requirements.
Jewel of Harmony
Adds yellow (Harmony) option
Adds a random yellow Harmony option to an item. Options vary by item type and can be removed by Jerridon NPC in Aida.
- Weapons: min/max attack, skill power, critical/excellent damage, SD options
- Armor: defense, max HP/AG, damage decrease, SD ratio
- Shields: defense, SD options, damage reduction
No failure chance
Tactics
- Only use Harmony on serious, fully-built gear.
- Prepare item level, excellent options, Luck and additional option first.
- Remove bad yellow options via Jerridon NPC in Aida.
- For weapons, damage-related options are usually best.
- For armor, damage decrease, HP and SD options are preferred.
- Be ready to use many Harmony jewels to roll the desired option.
Item Upgrade Path
Common Mistakes
Using Soul before Bless
Bless is 100% safe up to +6. Using Soul too early wastes jewels.
No Luck on expensive items
Luck raises Soul and Life success chance from 50% to 75%. Always prefer items with Luck for high upgrades.
Harmony on unprepared items
Harmony optimization is expensive. Do it only after the item already has good level, options and Luck.
Refining a bad Harmony option
Never spend Refining Stones on an unwanted yellow option. Remove it first via Jerridon NPC.
Selling Creation and Guardian
Both are required for resets and grand resets on this server. Do not sell them.