# Energy and Runes

### Energy System

Each Catto NFT has an energy capacity, which allows for runes to be socketed to the Catto. As a user gains EXP and levels up their NFTs, the energy capacity of the Catto will grow. Catto NFTs can only hold as many runes as their energy capacity allows for.

<table><thead><tr><th width="150">Level</th><th>Tier 1 Energy Capacity</th><th>Tier 2 Energy Capacity</th><th>Tier 3 Energy Capacity</th></tr></thead><tbody><tr><td>0-5</td><td>0</td><td>2</td><td>4</td></tr><tr><td>6-10</td><td>2</td><td>4</td><td>6</td></tr><tr><td>11-15</td><td>3</td><td>5</td><td>7</td></tr><tr><td>16-20</td><td>4</td><td>6</td><td>8</td></tr><tr><td>21-25</td><td>5</td><td>7</td><td>9</td></tr><tr><td>26-30</td><td>6</td><td>8</td><td>10</td></tr><tr><td>31-35</td><td>7</td><td>9</td><td>11</td></tr><tr><td>36-40</td><td>8</td><td>10</td><td>12</td></tr><tr><td>41-45</td><td>9</td><td>11</td><td>13</td></tr><tr><td>46-50</td><td>10</td><td>12</td><td>14</td></tr></tbody></table>

### Runes

#### **Rune Type and Generation**

There are three types of runes (Wisdom Rune, Sharpness Run, and Excellency Rune) that boost static stats when socketed to a pair of Catto NFTs. Runes are generated as users read and differ in rarity, with rarer runes giving a higher stat boost.

#### Rune Effect and Energy Cost

**Wisdom Rune (Boosts Earning Cap)**

<table><thead><tr><th width="200">Rarity</th><th width="205.00000000000003">Boost</th><th width="150">Energy Cost</th></tr></thead><tbody><tr><td>Common</td><td>Daily Earning Cap +0.3</td><td>2</td></tr><tr><td>Uncommon</td><td>Daily Earning Cap +0.4</td><td>2</td></tr><tr><td>Rare</td><td>Daily Earning Cap +0.5</td><td>1.5</td></tr><tr><td>Supre Rare</td><td>Daily Earning Cap +0.6</td><td>1.5</td></tr></tbody></table>

**Sharpness Rune (Boosts Earning Speed)**

| Rarity     | Boost               | Energy Cost |
| ---------- | ------------------- | ----------- |
| Common     | Earning Speed +0.04 | 2           |
| Uncommon   | Earning Speed +0.06 | 2           |
| Rare       | Earning Speed +0.08 | 1.5         |
| Super Rare | Earning Speed +0.1  | 1.5         |

**Excellency Rune (Experience)**

| Rarity     | Boost            | Energy Cost |
| ---------- | ---------------- | ----------- |
| Common     | EXP Per Min +1   | 2           |
| Uncommon   | EXP Per Min +1.5 | 2           |
| Rare       | EXP Per Min +2   | 1.5         |
| Super Rare | EXP Per Min +2.5 | 1.5         |

#### **Rune Socket and Removal**

While it is free to attach a rune to a pair of Catto, it costs $READ to remove a rune.

**Removal Cost**

| Rarity     | Cost ($READ) |
| ---------- | ------------ |
| Common     | 5            |
| Uncommon   | 10           |
| Rare       | 20           |
| Super-Rare | 30           |

#### **Rune Generation**

Runes are generated during the reading process.&#x20;

#### **Rune Upgrade Process**

Runes can also be combined and upgraded to the next rarity.

<table><thead><tr><th width="294.6667666017089">Rarity</th><th>Number of Runes Required From Lower Rarity</th></tr></thead><tbody><tr><td>Uncommon</td><td>2 X Common</td></tr><tr><td>Rare</td><td>3 X Uncommon</td></tr><tr><td>Super Rare</td><td>4 X Rare</td></tr></tbody></table>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://whitepaper.readon.me/read-fi-token-economy/read-fi-mechanism/energy-and-runes.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.