> For the complete documentation index, see [llms.txt](https://docs.bombpixel.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bombpixel.xyz/game-events/economy-components/hourglass/how-to-recharge-hourglass.md).

# How to recharge Hourglass?

#### **Recharge Mechanics**

* **Only exhausted Hourglasses can be recharged.**
* Players use **Sand** to recharge an Hourglass.
* Workshop rarity can fully recharge Hourglasses of equal or lower rarity.
* Players need to sign an **on-chain transaction** for recharging.

{% hint style="info" %}
Sand + Exhausted Hourglass + Rare Workshop = Full Rare/Common/Uncommon Hourglass
{% endhint %}

<figure><img src="/files/unHQ3rDLp50nrzYsfmzo" alt=""><figcaption></figcaption></figure>

#### **Sand Cost for Recharging**

| Rarity    | Sand Required |
| --------- | ------------- |
| Common    | 300           |
| Uncommon  | 600           |
| Rare      | 900           |
| Epic      | 1200          |
| Legendary | 1500          |
| Mythic    | 1800          |
| Unique    | 2100          |