Upgrade System Guide
Everything you need to know about upgrade stones, success chances, downgrade, break chance, and how high-level upgrades work.
Available Upgrade Stones
Upgrading Stone
Standard upgrade stone for low and mid upgrades.
- Can be used on items below +10.
- Uses normal success rate.
- If it fails, the item may downgrade.
- From +5 and above, the item may also break.
X Stone
A special stone used for safer upgrades before +10.
- Can be used on items below +10.
- Uses the normal success rate.
- If the upgrade fails and you have 1x Upgrading Stone in your inventory, the item will not downgrade and will not break.
- This protection consumes 1x Upgrading Stone.
- If you do not have an Upgrading Stone, the item can downgrade and starting from +5 it can also break.
Ultimate Upgrading Stone
Main stone used for upgrading items +10 and higher.
- Can only be used on items +10 or higher.
- Uses the normal success rate.
- Requires additional X Stones depending on the current item level.
- If the upgrade fails, the item normally downgrades.
- If you have 1x Upgrading Stone in your inventory, the item is protected from breaking but it can still downgrade.
- Without that protection, the item may downgrade and may also break.
Overcharged Upgrading Stone
The safest and strongest upgrade option.
- Can be used on any valid upgradeable item.
- Has 100% success rate.
- The item never downgrades.
- The item never breaks.
Which Stone Can Be Used?
| Item Upgrade Level | Allowed Stones | Notes |
|---|---|---|
| +0 to +9 | Upgrading Stone, X Stone, Overcharged Upgrading Stone | Regular upgrade stage. |
| +10 and higher | Ultimate Upgrading Stone, Overcharged Upgrading Stone | Ultimate Upgrading Stone also requires X Stones. |
How Safe Protection Works
| Stone Used | If Upgrade Fails | Protection Condition |
|---|---|---|
| Upgrading Stone | Can downgrade, and from +5 can also break | No built-in protection |
| X Stone | Normally can downgrade and break | If you have 1x Upgrading Stone, the item will not downgrade and will not break (the Upgrading Stone is consumed) |
| Ultimate Upgrading Stone | Can downgrade and break | If you have 1x Upgrading Stone, the item cannot break but it can still downgrade |
| Overcharged Upgrading Stone | Never fails | No protection needed |
Required X Stones for High Upgrades
When using the Ultimate Upgrading Stone on an item that is already +10 or higher, you must also have extra X Stones in your inventory.
| Current Item Level | X Stones Required |
|---|---|
| +10 | 1 |
| +11 | 2 |
| +12 | 3 |
| +13 | 4 |
| +14 | 5 |
| +15 | 6 |
Success Rate by Upgrade Level
| Upgrade To | Success Rate | Fail Result |
|---|---|---|
| +1 | 100% | No downgrade below 0 |
| +2 | 50% | Downgrades to +1 |
| +3 | 45% | Downgrades to +2 |
| +4 | 40% | Downgrades to +2 |
| +5 | 35% | Downgrades to +3 |
| +6 | 30% | Downgrades to +3 |
| +7 | 25% | Downgrades to +3 |
| +8 | 20% | Downgrades to +4 |
| +9 | 15% | Downgrades to +4 |
| +10 | 12% | Downgrades to +4 |
| +11 | 10% | Downgrades to +4 |
| +12 | 9% | Downgrades to +5 |
| +13 | 8% | Downgrades to +5 |
| +14 | 7% | Downgrades to +5 |
| +15 | 6% | Downgrades to +5 |
Break Chance on Failure
From +5 onward, failed upgrades may destroy the item unless it is protected.
| Current Item Level | Break Chance on Failure |
|---|---|
| +5 | 5% |
| +6 | 7% |
| +7 | 9% |
| +8 | 12% |
| +9 | 15% |
| +10 | 18% |
| +11 | 22% |
| +12 | 26% |
| +13 | 30% |
| +14 | 35% |
| +15 | 40% |
Bonus Stats from +10 and Above
Items that reach +10 or higher gain additional stat growth. This means upgrades become stronger after +10, making high-level equipment significantly more powerful.
| Stat | Normal Upgrade Bonus | Extra Bonus at +10+ | Total from +10+ |
|---|---|---|---|
| Attack | 2% | +2% | 4% |
| Extra Attack | 4% | +3% | 7% |
| Defense | 2% | +2% | 4% |
| Extra Defense | 4% | +3% | 7% |
| Armor | 2% | +2% | 4% |
| Hit Chance | 3% | +2% | 5% |
How to Upgrade an Item
- Make sure the item is upgradeable. Only valid weapons and armor can be upgraded.
- Choose the correct stone for the current item level.
- Use the stone on the target item.
- If the upgrade succeeds, the item gains one upgrade level.
- If the upgrade fails, the result depends on the stone used and whether the item is protected.
Examples
Example 1: Using X Stone on a +7 item
If the upgrade succeeds, the item becomes +8.
If the upgrade fails and you have 1x Upgrading Stone, the item stays at +7.
If the upgrade fails and you do not have that protection, the item may downgrade and may also break.
Example 2: Using Ultimate Upgrading Stone on a +12 item
You need 3x X Stones because the item is currently +12.
If the upgrade fails and you also have 1x Upgrading Stone, the item is protected from breaking.
Example 3: Using Overcharged Upgrading Stone
The upgrade always succeeds. The item never downgrades and never breaks.