You can add rarity to your NFTs by adding different attributes.
To add a new attribute you'll need to add an attribute Category and a Value for each NFT.
Add an Attribute Category
Every column you add after the quantity column (D) will be an attribute category for your assets.
Add an Attribute Value
After adding an attribute column (e.g., column E 'color') you will have to add the attribute value to each cell of your assets (e.g., cell E1 'red').
You can add custom attributes to your NFTs and OpenSea will display them accordingly:
Currently, the formats allowed are:
- date (timestamp)
If you want to add a custom attribute, you'll have to add a colon and the attribute type after the attribute name in the column: