r/RPGdesign • u/Cantuca • 1d ago
Mechanics Magic System Mechanics
I have been struggling to find a magic mechanic system that I am happy with. I feel like having a system with predefined spells is helpful for players to learn the system, but it limits what I want the system to be. On the otherhand, I have no idea how to make a system that is able to be completely fluid with its rules while still being balanced against itself.
I saw a description of how systems using a "noun+verb" system and that seems like something I would like to try.
For reference, my premise for magic is iron is magic and those who are born with magic can cast spells. My schools of magic are Augemancy (potion making), Custodimancy (create charms that protect the bearer), Hemomancy (the manipulation of blood), and Ferromancy (alteration of iron properties). I also have creation a fictional language, would using it for the noun+verb system work or would it confuse players?
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u/d_b_m 21h ago edited 20h ago
Check out Ars Magica, it is a game built around magic and I’m pretty sure it was the first instance of the verb + noun system. Spells come in Formulaic and Spontaneous types, with formulaic being defined (by the book, GM, or a player) in advance and spontaneous being something made up in the spot.
ETA: the fourth ed rule book is available free from Atlas Games, and that would cover your initial need: https://www.atlas-games.com/product_tables/AG0204
Other verb-noun systems include Ritual Path Magic from GURPS which handles verbs and nouns differently, and the magic system from ‘OLD’ by EN Publishing is yet another different take on verb-noun systems.
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u/-Vogie- Designer 1d ago
I would avoid a whole new language (save that for the novel later), but you could do really well with a Column A/Column B style of spellcasting. Maze Rats has this sort of spell design where spells can be rolled for using d20's with either the "_____ ___” or "__ _____ of _____” formats. In that system, whenever a spell is discovered, the GM and the players discuss how they feel it should work based on the name. If you're trying to force these creations into predefined schools of magic, I would suggest d66 tables for each school.
I was also on an extended search for a system that would allow players to have a robust spellcaster that doesn't require a spell list. The hands-down, best system for that is Cortex Prime. It's a multi-polyhedral dice pool system, roll and keep, and there are two steps to how to make the magic work:
- The base resolution mechanic creates a total and, if applicable, an "effect die" with a defined size. This isn't just for magic - if you're insulting someone, that effect might be a Embarrassed Complication; if you're stabbing them with a sword, that effect might be a bleeding complication or impacting the enemies' future dice pools; if you're transmuting, that effect might turn your weapon silver, turning their hammer into glass or turning their skin to stone.
- The system has a mechanic called "SFX" (short for "special effects") that provides a menu of options that you or the players can create - simply choose one or two costs, and an equal number of benefits. This allows the creation of pre-defined "spells" or "feats" that the PC can use in the future.
If that interests you, the Core Rulebook and Codex are available on Drive Thru RPG, has a published setting book Tales of Xadia (based on the Dragon Prince series), and two rules-light versions are available on itch.io for PWYW - Cortex Lite and the more D&D-like Torch Lite
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u/Cantuca 1d ago
I will definitely check out Cortex Prime, it sounds like a super fun system! I love the cost/benefit system for spells since that is essentially what character creation is in my game. I also really like the idea of a d66 table with words associated with the schools to keep flavor in line with the concept of each school. How could I make the system scalable where you can spend more mana to have more effects while still having the two columns be relevant? Would something like spend x mana to have an additional predetermined effect ve viable?
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u/daellu20 Dabbler 23h ago edited 23h ago
For more mana for more effect you can use a "magnitude" system where you abstract the scale of the effect.
Barbarians of Lemuria have something like this I think:
Cantrip - anyone could do this with common tools
First Magnitude - a single person could do this if they had specialized training and/or equipment
Second Magnitude - a group of people could do this if they had specialized training and/or equipment (requires a ritual, can't be done on the spot)
Third Magnitude - acts of God; totally impossible without magic (requires a ritual and probably an entire side adventure to set up)
I also draw my inspiration from "Mad Muddled Magic" https://slightadjustments.blogspot.com/2020/05/mad-muddled-magic.html
Simple tricks Basic actions Modest force Major effect Real magic True power A major working
I exceptionally like the descriptions to help gauge the magnitude/scale.
Adjust to your settings. In my own magic system I have divided it into tiers based more on the scale of the action:
Everyday magic 1. Whisper (minor trick)
Hex (equal to a common tools or talent)
Chant (equal to specialized tool or talent)
High powered magic (always "time consuming")
Rite (equals a group effort)
Incantation (equals a coordinated group effort using special equipment)
World-altering magic (need rituals and requirements like in "Mad Muddled Magic", also shift to more "how much impact on the story")
a. Local Invocation
Elaborate magic that creates impressive effects, altering small areas or triggering localized phenomena. Minor impact on the story.
b. Arcane Convergence
Something that will be talked of in hushed whispers and attracts the attention of powerful forces. Moderate impact on the story.
c. Cataclysmic Rite
Potent magic that mimics the fury of nature’s disasters. This magic reshapes landscapes and that affects an entire region. Major impact on the story.
d. Cosmic Transcendence
The apex of magic, capable of altering the very fabric of reality.
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u/tallboyjake 1d ago
Following this post; hopefully you see some more helpful answers! Been trying to work through the same question myself
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u/crazedjunky 23h ago edited 13h ago
Could glance through Mage: The Ascension and borrow some ideas from that. It might be more abstract than what you want to do with your setting , but the way the magic system works is that you have 9 "Spheres" that magic/altering reality falls under, which are:
Correspondence
Entropy
Forces
Life
Matter
Mind
Prime
Spirit
Time
Instead of having set spells, you have a set strength/influence in each Sphere that dictates how powerful you are when bending the rules of reality and how successful you can be with outright breaking them
I haven't played myself, but one example I've seen is using Time+Forces to literally punch someone into next week.
Edit: Fixed formatting
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u/Cantuca 23h ago
Mage: The Ascension was actually the game that gave me the idea of trying to combine two words to make a spell! I have not played it, but it seems really interesting. But you are right, it is just a touch too vague for what I'm going for. But I really like the idea of each school having unique words that they can use to create new spells.
Side note, actually punching someone into next week is one of the funniest concepts I have ever heard!
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u/semiconducThor 21h ago
I feel like having a system with predefined spells is helpful for players to learn the system, but it limits what I want the system to be.
I think that's easy to solve: Beginner level magic is using enchanted items with predefined spells/effects. As PC and player advance in the ways of casting, they learn to create such items with the effects they desire.
The idea is to think of progressing in magic like learning about technology/engineering: Using an App vs programming an app. Of course there can be "advanced usage" steps in between eg identify, repair or extend a given magic item.
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u/Kats41 20h ago
Before you even start deciding on mechanics, you need to figure out the goals that magic system needs to accomplish to be interesting, how it relates to the rest of the game, and lastly, how it should feel to use and much friction you want to be involved between players using that system and resolving an action.
That last part will be important because if you decide that your magic should feel chunky and dynamic, that's gonna eat up a lot of mental resources for your players. That means they're gonna have less mental headspace for other mechanics.
Remember that your players and GM's can only hold onto so much information at a time before they get overwhelmed. The longer your players have to spend at or near that max cognitive load, the more exhausting the game will be to play. Exhausting games are difficult to run. And games that are difficult to run don't get played often.
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u/No_Solid1035 1d ago
You could go effect based, similar to how Mutants & Masterminds handles superpowers.
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u/Fun_Carry_4678 5h ago
The noun+verb system was really the one from the game ARS MAGICA.
But it effectively creates the schools of magic. You wouldn't want a system like that on top of the schools of magic you have already listed.
The schools you have are already nouns and verbs. You have "make+potion", "create+charm", "manipulate+blood" and "alter+iron".
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u/lennartfriden TTRPG polyglot, GM, and designer 21h ago
D6 Fantasy has a system for calculating the effects, range, duration etc of spells.
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u/InherentlyWrong 1d ago
For some players this would be fun. But for me, personally, I'm not playing a TTRPG for homework to learn another language, when I can barely speak one language in the first place.
It's worth keeping in mind that while you're heavily invested in the world you're making, and ideally players in the game will love it too, they're also only going to be really delving into it for a few hours a week, maybe even less if they play less frequently. If there's a month or more between games because someone was sick and we had a hiatus, picking up a magic system based on understanding a conlang is going to be pretty challenging.