YGO TCG Structure Deck Lair of Darkness - Rules of Play says:
Each Structure Deck: Lair of Darkness contains:
- 1 Preconstructed Deck of 41 cards
- 2 Ultra Rares
- 3 Super Rares
- 36 Commons
- 1 Common Token 1
- Beginner's Guide
- 1 Double-sided Playmat/Dueling Guide