Structure Deck: Advent of the Emperor is a Structure Deck in the Yu-Gi-Oh! Official Card Game (OCG). It is the fourteenth deck in the OCG's Structure Deck series (twenty-second including the Character Structure Decks), following Structure Deck: Undead World. The TCG equivalent of this deck is The Dark Emperor Structure Deck.
The deck features the "Monarch" series, including a new "Monarch", "Caius the Shadow Monarch". It features 5 cards new to the OCG on its release, the other 4 being "Dimensional Alchemist", "Samsara Kaiser", "D.D.R. - Different Dimension Reincarnation" and "By Order of the Emperor".
Each Structure Deck: Advent of the Emperor contains:
- 1 Preconstructed Deck of 40 cards
- 1 Rulebook
- 1 Playing Guide
- 1 Playmat
ＳＴＲＵＣＴＵＲＥ ＤＥＣＫ— 帝王の 降臨— (Japanese)