
- BGG rank
- BGG #1,494
- BGG rating
- 7.3
Thunderstone: Dragonspire
- 1–5 players
- 45 min
- Complexity 2.7/5
- 2011

Rules assistance for Thunderstone: Thornwood Siege
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

What would you like to know?
Answers come from the official rulebook, with the page to check.
Thunderstone: Thornwood Siege is an expansion for Thunderstone released in 2011 for 2–5 players, 45 minutes per game, and ages 12 and up. It was designed by Mike Elliott and Brent Keith and its main mechanics are Hand Management, Open Drafting, and Deck, Bag, and Pool Building.
Deep in the heart of Thornwood Forest lies the Stone of Blight, one of the Thunderstones desperately needed for the salvation of the world. With the forces of Doom ravaging the lands, time is growing short. When brought together, the Stones have enough power to cast him out of the world- but every stone must be captured if the heroes hope to succeed! The heroes are now gathered in Wulfburg at the border of the forest, prepared to brave the dangers of the wood and seek out the Thunderstone, but there is a problem: not only is the Stone fiercely guarded by Doom's minions, they are attacking the town. You must break the siege! This expansion to Thunderstone introduces new monsters such as the Raiders and Siege Engines which bring the battle to you! These monsters can destroy cards in the village, kill heroes not yet hired, and even hurt you on turns when you are avoiding the dungeon! Will you survive to claim the Thunderstone?
Thunderstone: Thornwood Siege supports 2–5 players according to the catalogue. This range comes from the publisher’s listed player count, so the game can be set up for any group size within it. Some setups, rules and scoring details may still vary by player count, so check your edition’s rulebook for the exact configuration.
The listed playing time for Thunderstone: Thornwood Siege is 45 minutes. This is the publisher’s estimate for a full game. The actual duration depends on the group, the player count and familiarity with the rules: first sessions usually run longer, while experienced groups often finish faster. Setup and teaching time are not included in this estimate.
The catalogue lists Thunderstone: Thornwood Siege for ages 12 and up. This is the publisher’s recommendation and reflects reading demands, rule complexity and small components rather than theme alone. Younger players can often join with help from an adult, so check the age guidance on your edition and consider your group’s experience with board games.
Thunderstone: Thornwood Siege has a complexity rating of 2.7 out of 5 from BoardGameGeek players, which makes it a medium-light game. The rating reflects how much rules knowledge, planning and decision-making a typical game demands. Expect a longer first teach for heavier games, and use a preparation guide before game night.
Thunderstone: Thornwood Siege belongs to these categories: Card Game, Fantasy, and Expansion for Base-game. Its main mechanics are Hand Management, Open Drafting, and Deck, Bag, and Pool Building. Categories describe the theme and setting of a game, while mechanics describe what players actually do on their turns. Each mechanic links to a catalogue hub with similar games, which helps when you want something comparable.
The credited designers of Thunderstone: Thornwood Siege are: Mike Elliott and Brent Keith. These credits come from the published game data and name the people responsible for the game’s design, not its illustrators or publishers. Designer pages on MeepleRules collect other titles by the same designers, which helps when you enjoy a game and want to find similar ones.
The catalogue lists Thunderstone: Thornwood Siege as an expansion for Thunderstone. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need Thunderstone to use it. Check that your edition of Thunderstone is compatible, as some expansions were revised between editions.