Description from the publisher:
Tichu Booster is an expansion to celebrate the 25th anniversay of Tichu. The new booster cards add a lot of variety to the game, with each card being a one-time boost, hopefully giving you an advantage or preventing harm.
During set-up, shuffle the 57 booster cards and place them in the middle of the table as a face-down draw pile, then reveal the four topmost booster cards and place them near the draw pile as a face-up display. Every time a player calls a Tichu, the booster cards on display are distributed among the players, with the player who called "Tichu" having the first pick.