Weekly Event

Weekly Event is a game mechanic introduced on version 1.10.14 of Plants vs. Zombies Heroes. It allows the player to obtain event-exclusive cards with a new currency called Tickets. Each week, a new card will appear replacing the old one, making it no longer obtainable.

Tickets
Tickets are a special currency that are used to obtain that week's card. Winning a single player mission will award you 10 tickets. Winning a multiplayer match will award you 15 tickets. Each copy of a card requires a specific amount of tickets.

Boost
Boosts are a mechanic that will allow the player obtain more tickets by playing a hero with a specific class. Each Weekly Event has four boost classes, two plant classes and two zombie classes. Playing with a hero that has one matching class will multiply your tickets by five. Playing with a hero with two matching class will multiply your tickets by ten. For example, the boost class are Brainy and Sneaky. Playing with a Brainy hero such as Rustbolt will multiply your tickets by five. However, playing as Super Brainz, who leads both Brainy and Sneaky class, will multiply your tickets by ten. After using a boost, one will need to wait for four hours (or pay 20 gems) before the boost refills, making it usable again. The boost may target classes that the player may not own, like Solar and Mega-Grow when the player does not have Chompzilla, however if there is two target classes the player doesn't own, a Hero Pack will be available in the Shop until the event ends, which contains the Hero with the two classes the player needs.

List of cards obtained via events
The table below shows when each card was able to be obtained and how many tickets were needed to obtain one card.