GURPS Magic - Creating gemstones

[Kromm]

The simplest fix is to say, "Sure, why not?" and allow "Create X" and "Y to X" spells to work with anything that reasonably falls into the domains of X and Y . . . but also to do what GURPS Dungeon Fantasy and the Dungeon Fantasy RPG do and say that anything created this way lasts for one day unless irreversibly consumed (e.g., air is breathed, water is swallowed, or coal is burned). The spells that do this don't count as "on," nor can they be maintained (or for that matter, canceled early) – they just don't last forever. It follows that Detect Magic, Mage Sight, etc. could distinguish the resulting materials from "natural" ones, so short-term scams would be easy to catch – and in my campaign, ordinary merchants without spells would routinely use a cheap alchemical elixir that works like a counterfeit banknote detection pen!

Could truly permanent creation be possible? Sure. Call it an enchantment version of the same spell, at some huge multiple of the usual energy cost. Even if cubic yards of gold or huge diamonds are possible, I doubt mages would spend months or years investing thousands of energy in the task. If they want to get rich, there are easier ways.

[joppeknol]

Originally Posted by Kromm

and say that anything created this way lasts for one day unless irreversibly consumed (e.g., air is breathed, water is swallowed, or coal is burned).

Wouldn't that get into a munchkin discussion on what counts as consuming? I just googled that gold reacts with some other elements. Isn't that similar as consuming air or eating food?

I had the idea to have it randomly revert back after it is hit by a random local no-mana wave (*insert some magical mumbo-jumbo here*). It normally only can happen after a month. This makes eating some magical food fine, but you cannot live on it forever. Conjured valuables (or stone) can be detected by magical aptitude or elixirs and distributing them without consent is punishable as counterfeiting.

It might however, still be feasible to create temporary manastones.

[Kromm]

Originally Posted by joppeknol

Wouldn't that get into a munchkin discussion on what counts as consuming? I just googled that gold reacts with some other elements. Isn't that similar as consuming air or eating food?

Only if the GM puts up with it . . . and I'm not that kind of GM! I don't run fantasy games where real-world science operates behind the scenes and the locals just aren't aware of it yet. I run the kind where magic replaces science, where there really are just four or five elements, and alchemy works "because magic." When players try to use science to explain nature in a fantasy campaign (whether to invent gunpowder or cheese the way spells work), I ask them to word it in a way their character would understand in a TL3 setting with wizards, where everybody believes in spirits, curses, and alchemical transformations.

For me, "consumed" is "gone." You eat food, drink water, or breathe air and it's gone, transformed into vital essence. You burn fuel and it's gone, transformed from solid or liquid to gas. Whereas tarnish and patina are just materials getting old and showing the magical traces of their long lifespans.

[hal]

Originally Posted by Kromm

The simplest fix is to say, "Sure, why not?" and allow "Create X" and "Y to X" spells to work with anything that reasonably falls into the domains of X and Y . . . but also to do what GURPS Dungeon Fantasy and the Dungeon Fantasy RPG do and say that anything created this way lasts for one day unless irreversibly consumed (e.g., air is breathed, water is swallowed, or coal is burned).

Herein lies the crux of the matter. If you don't like how a spell as written works, fix it so it does. If you want things to be somewhat different, simply change duration type to ongoing and costs fatigue to maintain. Change duration to hours, or what have you. It is your game.

[Anthony]

In general if magic allows creating items of value, you should decide how wealthy you think a creation specialist mage should be, and then either adjust the price of things in-setting to match, or adjust how the spells work so the creation mage won't become wealthier than that.

Given the wide variety of tricks available for offsetting fatigue costs in GURPS Magic, a simple rule that accomplishes the latter is to just set a minimum fatigue cost for creating permanent things with magic equal to the monetary value of the thing.

[malloyd]

Originally Posted by Kromm

do and say that anything created this way lasts for one day unless irreversibly consumed (e.g., air is breathed, water is swallowed, or coal is burned).

Originally Posted by joppeknol

Wouldn't that get into a munchkin discussion on what counts as consuming? I just googled that gold reacts with some other elements. Isn't that similar as consuming air or eating food?

The adjective matters - it's [irreversibly] consumed. So sure maybe you can find some analogous reaction with gold (though I can't think of a likely case, elements are a bad choice for this, you really need lost complexity to make it work). But if you can, so what? You can't reverse it to get the gold back.