# Item Upgrade

[***Read more on how you can get the Trader's Certificate*** ](/game-guide/exploring-the-world/quests.md#traders-certificate-quest)

Once you have acquired at least one of the Trader's certificates, you will be able to start upgrading your items for higher level equivalents. 

Here is the list of Items you can upgrade:

* Essences
* Matters
* Gems
* Arena Crystals
* Portal Keys<br>

There are a total of 6 Trader's Certificates. Each one is able to unlock a different levels of upgrades for your items. The Golden Trader's Certificate unlocks upgrades for all level items.

| Certificate                 | Upgrade Tier                                                                 |
| --------------------------- | ---------------------------------------------------------------------------- |
| Trader's Certificate Lv1    | Lv1 -> Lv2                                                                   |
| Trader's Certificate Lv2    | <p>Lv1 -> Lv2<br>Lv2 -> Lv3</p>                                              |
| Trader's Certificate Lv3    | <p>Lv1 -> Lv2<br>Lv2 -> Lv3<br>Lv3 -> Lv4</p>                                |
| Trader's Certificate Lv4    | <p>Lv1 -> Lv2<br>Lv2 -> Lv3<br>Lv3 -> Lv4<br>Lv4 -> Lv5</p>                  |
| Trader's Certificate Lv5    | <p>Lv1 -> Lv2<br>Lv2 -> Lv3<br>Lv3 -> Lv4</p><p>Lv4 -> Lv5<br>Lv5 -> Lv6</p> |
| Trader's Golden Certificate | Allows upgrades for all levels                                               |

<figure><img src="/files/0Mf1whVtK1IFKcAsZlDH" alt=""><figcaption></figcaption></figure>


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