
- BGG rank
- BGG #1,019
- BGG rating
- 7.1
Vast: The Crystal Caverns
- 1–5 players
- 75–150 min
- Complexity 3.7/5
- 2016

Rules assistance for Materia Prima: The Alchemists Seal Expansion
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.
Materia Prima: The Alchemists Seal Expansion is an expansion for Materia Prima: The Alchemists Guild released in 2020 for 2–4 players, 60–90 minutes per game, and ages 12 and up. It was designed by Florian Pfab and its main mechanics are Variable Player Powers, Dice Rolling, and Grid Movement.
The all-dominant race for the Philosopher‘s Stone causes some alchemists to use dirty tricks. With the expansion, alchemists can block hexes with Seal Stones, occupy element mines, and build a resource monopoly. The Expansion also adds new alchemists, homunculi and equipment cards to the base game. —description from the designer
Materia Prima: The Alchemists Seal Expansion supports 2–4 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 Materia Prima: The Alchemists Seal Expansion is 60–90 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 Materia Prima: The Alchemists Seal Expansion 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.
Materia Prima: The Alchemists Seal Expansion belongs to these categories: Fantasy, Adventure, and Medieval. Its main mechanics are Variable Player Powers, Dice Rolling, and Grid Movement. 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 Materia Prima: The Alchemists Seal Expansion are: Florian Pfab. 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 Materia Prima: The Alchemists Seal Expansion as an expansion for Materia Prima: The Alchemists Guild. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need Materia Prima: The Alchemists Guild to use it. Check that your edition of Materia Prima: The Alchemists Guild is compatible, as some expansions were revised between editions.