Structure Deck: Marik is a Structure Deck in the Yu-Gi-Oh! Official Card Game (OCG). It is the eighth deck in the OCG's Structure Deck series, following Structure Deck: Kaiba Volume 2. It is the last Structure Deck in the OCG to be based off characters from the anime series.
The deck features cards used by Yami Marik, and also some of Strings' "Slime" cards with their corresponding support cards. It also contained a lot of cards from Labyrinth of Nightmare, Invasion of Chaos and Pharaonic Guardian, including a few "Gravekeeper's" monsters and support cards, representing Marik Ishtar's personal history. Two new cards are released for the first time, those being "Magical Stone Excavation" and "Malevolent Catastrophe".
The first 40 cards are in their own set, while a separator divides the last bit from the rest.
Each Structure Deck: Marik contains 55 cards in total. The number of card of each rarity are as follows: