A magic system in fantasy writing refers to the rules, limitations, and structures that govern how magic works within a fictional world. It defines what magic can and cannot do, who can use it, and the costs or consequences associated with using it. A well-defined magic system helps create a sense of consistency and believability in the story, making the fantastical elements feel grounded within the narrative’s logic.
It also creates some great moments in which characters can overcome the limits in believable ways by using their minds, instead of magic simply being capable of whatever the plot requires it to be capable of. That’s the main reason I really love good magic systems, and I think it’s worthwhile to take a closer look at how you can develop your own.
Types of Magic Systems
There are two basic types of magic systems in fantasy writing: hard and soft. A hard magic system has, as I described above, clear, well-defined rules and limitations. Magic users have specific abilities with known consequences. For example, in Brandon Sanderson’s Mistborn series, Allomancy allows users to ingest metals and “burn” them to gain various powers, each metal providing a specific ability. Once the metals run out, the user has no access to magic.
In a soft magic system, the use of magic remains vague and mysterious. The writer doesn’t clearly explain the rules in the story, and magic serves more as a plot device to create wonder or solve problems unpredictably. In J.R.R. Tolkien’s Middle-earth, for example, magic is present but not systematically explained. Characters like Gandalf perform magical feats without detailed exposition on how it works.
Some writers also go for what’s called a hybrid magic system, which combines elements of both hard and soft magic systems. Some aspects of the magic are clearly defined, while others remain mysterious. In J.K. Rowling’s Harry Potter series, certain spells have specific effects and rules, but the origins and full extent of magic remain partially unexplained.
Why I like hard magic
If you do have a hard magic system clearly defined in your head before you start writing, you can often prevent plot holes and maintain the internal logic of the story. I personally often prefer hard magic systems for this very reason. In addition, limitations and costs associated with magic can create obstacles for characters that drive the plot forward, while the way those characters interact with the magic system can reveal their strengths, weaknesses, and growth.
As a rather silly example, let’s say you write about a world where people can fly, but only if they wear special shoes that use up a limited supply of magic dust. Once the dust runs out, they can’t fly anymore until they find more dust. This creates a clear rule (you need the shoes and dust), a limitation (the dust supply), and a consequence (if you run out mid-air, you fall).
In the case of my novel, Loyalty Fallen, the rule is that you need gems or precious metals, each of which has a different effect. The gems become useless after being drained of power, and overuse of magic always has a consequence. In the case of boulder opals, which can cause earthquakes and cracks in the ground and in rocks, the user’s skin can become dry or severely cracked and scarred. In the case of sapphires, which are used basically to do a kind of ice magic, the users’ temperature can drop to dangerous levels and the users will begin to create snow and ice on anything they touch.
The limited supply of opals and other gems is also a main plot point in the story. Navinor invaded Iridalys specifically to get a large supply of verdant opals, which help in agriculture, after Navinor experienced a severe drought. Also, the characters are limited in their ability to protect themselves with magic because they don’t always have opals at hand.
Making a magic system
There are many different types of magic systems. Some will be elemental magic systems or base magic off of alchemy or imaginary substances. You’ll be the one to decide what type of magic you want to include, but here are some questions you can ask yourself to help:
- Source: Where does the magic come from? – In Loyalty Fallen, magic comes from gemstones or metal.
- Users: Who can use magic, and how do they gain this ability? – In Loyalty Fallen, this varies depending on the geographic location. In Iridalys, magic users are called Mages and can go to school to become Wardens. In Tephraya, however, magic users are mostly fugitives and looked down on by everyone.
- Rules: What are the specific laws that govern the use of magic? – In Loyalty Fallen, the main rule is simple: you need access to a gemstone or metal and be actively touching the object when attempting to use magic.
- Costs: What are the drawbacks or risks of using magic? – In Loyalty Fallen, Tephrayan blood ruby magic can poison the user and cause illness or death.
- Limits: Are there boundaries to what magic can achieve? – Loyalty Fallen has two boundaries: the human will and the resource. If a person has a strong will, they can essentially stretch the resources further for more powerful magic; however, once the resource runs out, the user will not be able to do any magic.
By thoughtfully developing these aspects, you can create a compelling and coherent magic system that enhances your fantasy narrative.
I also recommend using an AI tool like ChatGPT and simply telling the chatbot to “Ask me questions until you have all the answers you need to create a deep and compelling hard magic system.” The bot will ask you questions you hadn’t even considered previously.
Final thoughts
Fantasy is an awesome genre that doesn’t always have to be restrained by “realism” or the other rules we’re expected to follow in, say, historical fiction or a modern mystery. The rules are the ones you create, so the goal should be to create rules that contribute to the story and world and provide a framework within which you can explore creative solutions to the problems you’ve placed your characters in.
If you’ve already created a hard magic system or have one in progress, let me know in the comments as I’d love to hear about it! Also, please like this post if it was helpful and subscribe to continue reading more information about the fantasy genre and my novel, Loyalty Fallen.
You can read the first chapters of Loyalty Fallen here. I upload a new chapter each week on Tuesday at 5:00 PM PST.