Spark

Sparks are a crafting currency in Plants vs. Zombies Heroes, introduced with the 1.4.14 update. Sparks can be obtained by destroying premium cards that the player owns, and is used to craft new ones the player chooses.

To craft a card, the player only needs to access its description page on the almanac, and once selected, it will appear two choices, craft and destroy. Any of these two options can be reversed until the player leaves the almanac.