Magic System Design Questionnaire

A magic system is the set of rules, costs, limits, and cultural meanings that govern magic in a fictional world — the framework that turns magic from an authorial convenience into a source of narrative stakes.

Magic can be the spine of a fantasy novel or the thing that accidentally breaks it. A system that's too loose feels arbitrary — problems get solved by whatever spell the author invents in the moment. A system that's too tight reads like a manual — rules drown the wonder.

The work of magic system design is finding the shape your story actually needs. This questionnaire walks you through that shape, from the hardest systems (rules matter like physics) to the softest (magic is mystery, mood, and mythic presence). It slots underneath the worldbuilding bible template as a deeper layer of the Systems section.

Hard magic vs. soft magic vs. hybrid magic

Before you answer anything else, decide where on the hard-soft spectrum your magic sits.

Hard magic — Rules are explicit and consistent. Readers know what magic can and can't do, and the author solves problems within those rules. Associated with Brandon Sanderson, whose Laws of Magic are the canonical modern framework for hard systems. Magic is a system. Characters often master it deliberately.

Soft magic — Rules are felt but unexplained. Magic is mysterious, often beyond mortal control, and readers don't expect a rulebook. J.R.R. Tolkien's Gandalf and Ursula K. Le Guin's Earthsea are the touchstones. Magic is atmosphere. Characters don't master it — they encounter it.

Hybrid magic — Some aspects are hard (understood limits, named costs), others are soft (origins, deep workings). Most modern fantasy lives here.

Sanderson's First Law is the single most useful rule from the hard side: "An author's ability to solve conflict with magic is directly proportional to how well the reader understands said magic." If your protagonist is going to escape danger using magic, the reader must already understand the rule being applied — otherwise the escape feels like a cheat.

Almost every question below has a different useful answer depending on where on the spectrum you sit. Know that first. The rest follows.

1. Source

Where does magic come from?

• Internal — the user's mind, body, soul, bloodline, will
• External — gods, spirits, elements, the land, ancestors, objects, another plane
• Transactional — traded for something: blood, years of life, memories, favour, pain
• Relational — drawn from bonds — between people, places, oaths, promises
• Combinatorial — magic is what happens when specific conditions meet

The source shapes almost everything else. A magic that comes from the land feels different from a magic that lives in the blood.

2. Cost

What does it take to use magic?

• Physical — exhaustion, injury, age, scarring, eventual death
• Mental — memory loss, obsession, fragmentation of self
• Emotional — requires a specific state — grief, love, rage, focus, silence
• Social — branded as a mage, shunned, hunted, enslaved, sanctified
• Material — requires components, time, preparation, ritual
• Spiritual — debt to a being, drift from an original self, accumulation of something dangerous

3. Limits

What can't magic do?

This is more important than what magic can do. Stakes come from limits. A magic that can do anything is a magic that can solve anything — and that breaks plot.

• Fundamental limits — what's impossible in principle (no resurrection, no true creation, no mind-reading)
• Practical limits — what's extremely difficult (large-scale effects, permanent changes, long distances)
• Personal limits — the specific limits of your character (they're a weak practitioner, they've only learned one discipline, they have a block)
• Moral limits — what's possible but costs the user something they can't recover

The fundamental limits should feel baked into the world. The others can be negotiated with effort, ingenuity, or sacrifice — which is where story happens.

4. Who can use it

• Is magic universal, or restricted?
• If restricted — by bloodline, training, circumstance, accident, choice?
• How rare is a practitioner? One in ten? One in ten thousand?
• Can magic be taught? Taken away? Stolen?
• What happens to children born with ability? Tested, hidden, killed, celebrated?

The answers shape your story's social structure as much as your magic.

5. Social position

How does the world treat magic and its users?

• Open — magic is normal, taught in institutions, regulated like a profession
• Revered — mages are priests, saints, leaders — magic has sacred status
• Feared — mages are watched, controlled, sometimes eliminated
• Outlawed — practice is criminal; users hide, flee, or rebel
• Commodified — magic is a market — for sale, for hire, for export
• Forgotten — magic was once common, now scarce; those who practise it do so in the cracks

Most worlds have more than one answer at once — different cultures, different reactions.

6. Cultural texture

Magic rarely stays purely functional. It shapes language, religion, art, everyday life.

• Vocabulary — how do people talk about magic? Casual, reverent, euphemistic, medical?
• Rituals — the formal ways magic is performed in public (weddings, funerals, harvests, war)
• Folk practices — the small, unofficial magic of daily life — charms, warding signs, superstitions
• Art about magic — how do musicians, poets, priests depict it?
• Religious relationship — is magic part of worship, rejected by it, or separate?

These details are what make a magic system feel alive instead of engineered.

7. Conflict potential

A magic system that doesn't cause trouble isn't doing its job. Where are the friction points?

• Between practitioners — rivalries of discipline, school, tradition
• Between practitioners and institutions — states, churches, guilds that want to control what's wild
• Between generations — the old ways vs. the new, the remembered vs. the lost
• Between cultures — different traditions meeting, blending, clashing
• Between users and their own cost — the mage who wants more than they can afford

Conflict in the magic system is often where your plot's best engines are hiding.

8. The signature choice

Every great magic system has one unusual, specific choice that makes it feel like itself.

• In Mistborn, it's the consumption of metals.
• In The Name of the Wind, it's the named law of sympathy.
• In The Fifth Season (and the rest of N.K. Jemisin's Broken Earth trilogy), it's orogenes being both essential and despised — and the earth itself as an active, feeling thing.

What's yours? One thing, strange and specific, that no one else has said in quite that way.

The test

A working magic system should let you do three things without cheating.

• Generate problems — give your protagonist a worse day than yesterday using only the system's rules.
• Generate solutions — let your protagonist escape that problem using only clever application of what's already established.
• Generate cost — make sure the escape isn't free.

If you can do all three on the same page, for the same event — without inventing new rules on the fly — your system is working.

The magic doesn't have to be fully understood by the reader. It does have to be fully understood by you.