Yami Marik runs an Immortality-Torture Deck, which focuses on slowly torturing his opponents and watching them squirm, until ultimately playing "The Winged Dragon of Ra" in ways he finds most evoking of pain, i.e. using Ra's "Egyptian God Phoenix" (introduced when he dueled Joey Wheeler) and "Point-to-Point Transfer" abilities (introduced when he dueled Yami Bakura). When he proceeds to duel Yami Yugi, Yami Marik's strategy focuses primarily on reviving Ra from the Graveyard with "Monster Reborn" and continually transferring that card to his hand with cards like "Left Arm Offering", "Zombie's Jewel", and "Magical Stone Excavation". He also focuses on increasing his Life Points so he can activate both of Ra's abilities, resulting in a massive ATK for Ra to deliver the finishing blow, critical injury to his opponents—since he has played all of his Duels as Shadow Games—and sometimes both.
Besides this, his Deck is largely composed of Fiend-Type monsters, and his cards rely on draining an opponent of strength: "Helpoemer" discards cards; "Plasma Eel" lowers the ATK of an opponent's monster every turn; cards like "Bowganian", "Lava Golem", and "Coffin Seller" can burn through his opponent's Life Points. In particular to the theme of pain, many cards like "Byser Shock", "Viser Des", and "Nightmare Wheel" are all modeled after torture devices.