# 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>