20th Secret Rare Special Pack

20th Secret Rare Special Pack is a supplementary Booster Pack in the Yu-Gi-Oh! Official Card Game (OCG) given to buyers, who purchased 3 of 5 listed boxes at participating stores.

Breakdown
Each pack contains 1 card (out of 10 cards).
 * 10 20th Secret Rares

You only get 1 pack for each 3 boxes bought (out of the five listed below).
 * Cybernetic Horizon
 * Soul Fusion
 * Savage Strike
 * Dark Neostorm
 * 20th Anniversary Legend Collection