Progress · 2 min read
Upgrade items to +15
From +1 to +15 in MU Online: Jewel of Bless, Jewel of Soul and the Chaos Machine, with the success rate, the cost of each level and what happens on a failure.
The highest item level is +15. Up to +9 it goes up with jewels; from +10 to +15, in the Chaos Machine of the Chaos Goblin, in Noria.
Up to +9: Bless and Soul
Drag the jewel onto the item in your inventory.
| jewel | goes | success | if it fails |
|---|---|---|---|
| Jewel of Bless | from +0 to +6 | 100% | — |
| Jewel of Soul | up to +9 | 50% (75% with luck) | drops one level; from +7 up, back to +0 |
From +10 to +15: Chaos Machine
Bring the item, 1 Jewel of Chaos and the Bless and Soul from the table. One level at a time.
| to | zen | Bless + Soul | success |
|---|---|---|---|
| +10 | 2,000,000 | 1 + 1 | 60% |
| +11 | 4,000,000 | 2 + 2 | 60% |
| +12 | 6,000,000 | 3 + 3 | 55% |
| +13 | 8,000,000 | 4 + 4 | 55% |
| +14 | 10,000,000 | 5 + 5 | 50% |
| +15 | 12,000,000 | 6 + 6 | 50% |
- Item with luck: +25%.
- Excellent or ancient item: −10%. Socket item: −20%.
- If it fails, the item is gone, along with the jewels and the zen.

Shop talismans
Two items from the shop change the +10 to +15 combination. Put them in the machine with the item; they are spent whether it works or not.
- Talisman of Luck: +1% for 10 diamonds or +10% for 100. A combination adds up to 10%.
- Talisman of Chaos Assembly: if the combination fails, the item stays as it was instead of vanishing. One per combination; jewels and zen are spent either way. 150 diamonds.
Frequently asked questions
What is the highest item level in Idle MU?
+15. From +10 to +15 only through the Chaos Machine, one level at a time.
What happens if a +10 to +15 combination fails?
The item is gone, with the jewels and the zen. With a Talisman of Chaos Assembly in the combination, the item stays as it was.
Does item luck help in the Chaos Machine?
Yes: an item with luck gets +25% success. With the Jewel of Soul too (+25%).




