Emperor of Darkness Structure Deck is a Structure Deck in the Yu-Gi-Oh! Trading Card Game (TCG). It is the thirty-second Deck in the TCG's Structure Deck series, following Master of Pendulum Structure Deck. This deck is the TCG equivalent of Structure Deck R: Advent of the Legendary Monarch in the OCG. It contains 41 cards in total and includes a playmat, beginner's guide and token.