Themed Cube Primer: Writing One for a Restricted Cube

A themed cube primer carries one job a standard primer does not: it has to explain the restriction before a drafter can understand anything else. A Pauper cube, a set cube, a tribal cube, a cube with no cards printed after 2003, an artifact cube: in each, the rule that limits the card pool also rewrites what the archetypes are, what “a good card” means, and which questions the FAQ will field every week.

This article covers how to state the restriction, how to say what it costs, how the archetype section changes shape, and the sections a themed primer needs that a standard one does not. For a survey of theme ideas and which ones hold up, see themed cube ideas. This is about writing the document once you have picked one.

Where does the restriction go in the primer?

First. Before the size, before the power level, before the night’s format. The one-line description of a themed cube is the restriction plus the consequence: “Every card has been printed at common; it plays like a slower, grindier Legacy with no bombs.” “Only cards from Innistrad block; it drafts like the 2012 format, forever.” The reader cannot place anything else until they know the rule.

Then, in the “what this cube is” paragraph, state the restriction precisely. “Commons only” is not precise. “Every card has been printed at common in a paper set, including supplemental sets but not Arena-only releases, checked against Scryfall” is precise, and it closes a question that a loose version would open every week. The edge cases go in the FAQ; the rule itself goes here, exactly.

How do you explain what the restriction costs?

Every restriction removes something that drafters from other cubes expect, and the primer should say what. This is the paragraph most themed primers skip, and skipping it produces the most common first-night complaint: “where are the good cards?”

Be specific about the three things most restrictions affect:

• Removal. A Pauper cube has plenty of cheap removal but almost no sweepers. A set cube has whatever the set had, which may be very little. Say what kind of removal exists and what kind does not.
• Finishers. Without rares, games end differently. Name how. In Pauper it is usually evasion, go-wide, or a card advantage edge that grinds the opponent out. In a tribal cube it is the lord effects.
• Fixing. Restrictions often gut the mana. A commons-only cube runs on gain-lands and bounce lands. A pre-2003 cube has pain lands, original duals and the first fetch lands, but the duals are expensive. Say how many colors a drafter can expect to play, and whether splashing is realistic.

Then say what the restriction buys. Every good themed cube trades power for something: closer games, a set’s nostalgia, a tribe’s identity, a lower cost to build. Name it, because it is the reason the cube exists, and a drafter who knows the trade will enjoy the result instead of resenting the absence.

How does the archetype section change?

In a standard cube the lanes are mostly the ten color pairs. In a themed cube they are often not, and the section has to be redrawn around what the theme actually supports.

A Pauper cube’s lanes still mostly follow color pairs, but each paragraph needs one extra line: the engine at common that makes it work, because readers from higher-power cubes will not recognize it. “Blue-red spells, built around Kiln Fiend and the cantrip density” tells a Legacy cube drafter what to look for.

A tribal cube’s lanes are tribes, not colors. The section lists each tribe with its colors, its lord or payoff, and the number of creatures of that type in the cube. The count matters more than anything else, because a tribe with eleven members in a 360-card cube is a lane and a tribe with six is a trap.

A set cube’s lanes are the set’s own archetypes, and the section can lean on them: the designed two-color pairs the set shipped with, named as the set named them, with a line on whether the cube’s higher density of rares shifts the balance.

An artifact cube or a spells-matter cube has lanes defined by the theme’s sub-strategies, and the section should list those explicitly, with the count of enablers and payoffs for each, since drafters have no color-pair instinct to fall back on.

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Which extra sections does a themed primer need?

Three that a standard primer can skip.

The legality check. How a drafter or a would-be contributor can verify a card fits the restriction. For Pauper, a Scryfall search string. For a set cube, the set codes. For a date-restricted cube, the cutoff set by name. Give the exact tool, so suggestions arrive pre-checked.

The “why not” list. Themed cubes get a specific kind of question: “this card fits the rule, why isn’t it in?” Keep a short list of the most-asked ones with one-line answers. “Fits the rule but too strong for the table” and “fits the rule but no deck wants it” cover most of them.

What this cube is not trying to be. A themed cube is often compared to the format it imitates. A Pauper cube is not Pauper the constructed format; a set cube is not the set’s retail draft. One paragraph on the differences stops a particular kind of argument, usually from the drafter who played the original and remembers it a certain way.

How does the first-timer guide change?

More than any other section, because the pick rules a first-timer learns in a standard cube can be wrong here.

In a Pauper cube, “take the bomb” has no meaning; the rule becomes removal first, then cheap creatures, then card advantage. In a tribal cube, the first-timer’s rule is “pick a tribe by pack one pick four and stay in it.” In a set cube, the rule is whatever the set’s retail draft rewarded, which the primer should state in one line even if the drafter never played that format.

The five mistakes everyone makes once also change. Rewrite them for the theme. The standard list, and the one-page format it sits in, is in a one-page draft guide for first-timers; use the shape and swap the content.

A comparison of what each theme has to explain

The second column is the one most primers get wrong, by leaving it vague. “Pauper” is a category; “printed at common in a paper set, checked on Scryfall” is a rule.

What are the mistakes specific to themed primers?

• Assuming the reader knows the theme. “It’s a Pauper cube” means several different things to different people. State the rule.
• Apologizing for the restriction. Lines like “it’s not as powerful but it’s still fun” undercut the cube. State the trade and let the drafter decide.
• Listing standard archetypes that the theme does not support. A tribal cube does not have “blue-white control” unless there is a tribe that plays that way. Write the lanes that exist.
• Hiding the edge cases. If your Pauper cube allows a card that was common only in a supplemental product, say so in the FAQ before someone finds out at the table.
• Letting the theme go stale. A set cube’s rule does not change, but a Pauper cube’s pool grows every set. Note in the primer when the pool was last reviewed.

FAQ

What should a themed cube primer put first?

The restriction, stated precisely, in the one-line description and the first paragraph. Nothing else in the primer makes sense until the reader knows the rule.

How is the archetype section different for a themed cube?

The lane unit changes: tribes for a tribal cube, the set’s own archetypes for a set cube, sub-strategies for an artifact cube. Each lane also needs the engine that makes it work under the restriction.

Should a themed cube primer explain what the restriction removes?

Yes, specifically: which removal, finishers, and fixing are missing, and what the restriction buys in return. Skipping this produces the “where are the good cards” complaint.

Does a themed cube need a legality check in the primer?

Yes. Give the exact tool, such as a Scryfall search string or set codes, so drafters and contributors can verify a card before suggesting it.

The rule is the invitation

A themed cube’s restriction is not a limitation to explain away. It is the reason the cube exists, and the primer’s job is to state it so clearly that a drafter sees what it offers before they notice what it lacks. The game is the reason. The people are the point.

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