# Specific Collectibles Traits-Based Roles
This rule type allows you to assign a specific role to your **Discord** users based on a specific NFT trait from a particular **Collectibles NFT collection type** they own. Works for collections launched on [supported **EVM** chains](https://guide.bocto.octopeeps.com/basics/chains-marketplaces#supported-evm-chains) and listed on **OpenSea**, and for **Solana** collections listed on **Magic Eden**.
## Explanation of the Fields.
* In the **Rule Name** field, enter your desired rule name.
* In the **Marketplace** dropdown, select the marketplace where your collection is listed.
* In the **Collection Slug** or **Collection Symbol** field (appears only after choosing the **Marketplace**), enter the [collection slug/symbol](https://guide.bocto.octopeeps.com/appendix/getting-collection-slug-symbol).
* In the **Trait** dropdown, select the desired NFT trait (will appear only if the Collection Slug is correct).
* In the **Role** dropdown, select the prepared **@Role** you wish to assign to the holders.
{% hint style="danger" %}
If you set up the **Editions** collection type instead of the **Collectibles** type, no error will occur, but the rule won't work!
{% endhint %}
## Setting Up the Rule.
