The Promo Diamond (
) is the in-game item and currency introduced on the first Double Eleven event. that can be used to reduce an item's Diamond cost. 
1 equals 
1, but a minimum of 1 is required to obtain the discounted item, as the Promo Diamonds only covers up to 99% of the item price.
Promo Diamond can only be obtained and stored in a limited-time and will be removed from the player's inventory if it expires.
Uses
Promo Diamond is used to reduce the cost of diamonds when:
- Purchasing heroes
- Upgrading skins
- Emotes
- Certain items
- Skins
Obtaining Promo Diamonds
Events
- Main article: Carnival Paty
Only the Double Eleven and 515 events where players have a chance to win Promo Diamonds, primarily with Carnival Party. There are multiple stages in Carnival Party and if a stage ends, players can obtain Promo Diamonds that scales with ranking. (i.e. higher ranking = higher amount of Promo Diamonds.) Logging in within a limited time to obtain chests may contain Promo Diamonds during Double Eleven and 515 events.