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 currency that is used to obtain a card. Winning a singleplayer mission will award you ten tickets. Winning a multiplayer match will award you fifteen tickets. Each copy of a card requires different amount of tickets.

Boost
Boost are a mechanic that will allow the player obtain more tickets by playing a hero with a specific class. 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 that leads both Brainy and Sneaky class, will multiply your tickets by ten. After getting a boost, it will need to refill for four hours before being usable again.