It may be a bit dry, but it is an okay submission. The idea is quite interesting I must say, and with pretty much all options covered.
What is to be considered, however, is the possible impact of this material. If the means to detect magic are easily available, magic may loose something of its charm. How to smuggle an innocuous crused item somewhere, or use a spell secretly, without resorting to further trickery?
So the question is, how widespread is the material? Is the effect permanent? Plus, are there any downsides to using it? Go to Comment
If said alloys could be created, I imagine that you would have rulers with the traditional magical protections in place, as well as an alloyed form of this as jewelry that reacts to magics that work to influence or control the ruler's mind. Priestly types might have relics that react to 'holy' or 'unholy' magic. Or, if you're a specialzed kind of spellcaster, you might have something that doesn't react to your own form of magic, warning you of other potential hazards in the area.
Quite an intriguing item, and definitely with plenty of potential. Go to Comment
I could see an unscrupulous sort using this against the merchants, in turn; a minor, easily hidden cantrip, worked on the scales as the merchant puts things on it, and you could get people up in arms about manipulations. Easy to prove wrong, but certainly likely enough to cause some havoc in a crowded store and allow, say, a mystically inclined pickpocket to practice his craft much more easily. Go to Comment
Worn by a king, noble or just someone with a reason to fear the magic users, it changes colour when a wizard, witch, shamen or magical creature is close by, allowing the wearer to take evasive action or prepare for combat. Go to Comment
As with all things, the GM should adjust the scarcity with an eye towards it's true impact.
A lot of posts I see can have very powerful affects on a campaign if allowed to occur in large quantities, but the same can be said for classic magical metals like Mithral and Adamantite. Some pretty good subs get low ratings because people extrapolate the impact of large quantities of the material.
The sensitivity of the material I have left somewhat deliberately vauge - the only hint provided is from the passage at the start:
Now, as I bring it near this enchanted helmet, do you see the change? Note how the goblet lightens in shade as I bring it closer?
It is up to you how strong that helmet was in magic, and how close he had to bring the goblet for it to change color. Go to Comment
It is supposed to be a physical process, like some materials glow when struck by UV light, so it is difficult to interfere with it apart from blocking the magic emmissions.
Now, since it is not in itself magic, spells could be created to darken the material again or otherwise hide it's feedback. Without any magical energy of it's own, it will have no way to oppose a magical effect.
As for it's mechanical strength, it is an analog to silver and can be mixed with steel or other alloys, but it will reduce the strength of that material. It is much better used as a surface treatment, just as you would silver a sword or arrow. I'm partial to the idea of inlaid runes myself, glowing mystical symbols instead of the whole blade.