# 2.2.3  Skin NFTs

Each hero has 5 tiers of skin NFTs.For in-game mechanics, NFT Skins change the cosmetic appearance of the respective heros and affect the hero's state in the game, such as increasing the hero's attack or defense ability in all game modes, based on the rarity of the NFT skins.

## **Supply Based On Each Hero**

| Skin Tier               | Total Supply | How to Obtain     |
| ----------------------- | ------------ | ----------------- |
| Normal/N                | 2500/Hero    | Skin Shards Forge |
| Rare/R                  | 2000/Hero    | Skin Shards Forge |
| Super Rare/SR           | 1000/Hero    | Skin Shards Forge |
| Superior Super Rare/SSR | 500/Hero     | Skin Shards Forge |
| Ultimate Rare/UR        | 100/Hero     | Skin Shards Forge |

## Skin Attribute Boost <a href="#skin-attribute-boost" id="skin-attribute-boost"></a>

Different series of skins will enhance the hero's attributes, with higher-tier skins providing more attribute boosts.

<figure><img src="https://844519923-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F7r15y85dCVmrb7XrnLM1%2Fuploads%2FuPVJGDVMFGLrBeCZV5Fz%2Fimage.png?alt=media&#x26;token=d6670c1e-c0d3-4e92-a55d-a1669532d0f4" alt=""><figcaption></figcaption></figure>

## **Hero Skin Feature In-Game**

### **ACP Bonus**

The number of energy points consumed by hero cards of different tiers per match varies. After the adjustment, using hero cards with skins in the game can produce ACP more efficiently. The corresponding relationships are as follows:

* **UR:** Up to 10 energy points
* **SSR:** Up to 5 energy points
* **SR:** Up to 3 energy points
* **R:** Up to 2 energy points
* **N:** 1 energy point

### **FP Bonus in 5v5 Room Battle**

The corresponding relationships are as follows:

* **UR:** FP +400%
* **SSR:** FP +200%
* **SR:** FP +100%
* **R:** FP +75%
* **N:** FP +50%

### **Skin Forge**

Allows players to use lower-tier skins to randomly forge a higher-tier skin, provided the target skin has available stock.\
**Forge Formula:**

* **N + N** (Fee: 2 ACP) → Random **R**
* **N + R** (Fee: 5 ACP) → Random **SR**
* **SR x 10** (Fee: 100 ACP) → Random **SSR**
* **SSR x 10** (Fee: 1000 ACP) → Random **UR**

<figure><img src="https://844519923-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F7r15y85dCVmrb7XrnLM1%2Fuploads%2FuyK8vyn5CpuT8crk7suU%2Fimage.png?alt=media&#x26;token=d890e20e-4df3-4cc8-9dfb-dbf28d1161ac" alt=""><figcaption><p>Forge System</p></figcaption></figure>

### **Skin Exchange**

Allows players to exchange any skin for another skin of the same tier, provided the target skin has remaining stock.\
**Avatar User Privileges:** Users can enjoy three free exchanges per week.\
**Exchange Costs per Transaction:**

* **N: 2 ACP**
* **R: 5 ACP**
* **SR: 10 ACP**
* **SSR: 100 ACP**
* **UR: 1000 ACP**

<figure><img src="https://844519923-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F7r15y85dCVmrb7XrnLM1%2Fuploads%2Fxs30P7qYd18Oz8oUwbDR%2Fimage.png?alt=media&#x26;token=b0abf979-bc14-4a0b-9c3d-fb9bf0400a4a" alt=""><figcaption></figcaption></figure>


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