Armor and Spellcasting

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SeeleyOne
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#21 Postby SeeleyOne » Tue Oct 09, 2012 4:30 pm

Yeah I was just thinking about the chemistry and iron. I am going to venture to say that the reason that it may hurt Fairies is that they do not have blood like we do
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#22 Postby Zadmar » Tue Oct 09, 2012 5:11 pm

Cryonic wrote:If iron interferes with spellcasting, then nothing with hemoglobin (oxygen carrier in most creatures blood) can cast spells as blood uses iron to loosely attach with oxygen.

It really depends how much it interferes. The human body usually contains around 4-5 grams of iron, which would be about the same as having a few safety pins in your shirt, and considerably less than wearing a watch or belt buckle. If you're ruling that a 50 pound suit of full plate armour gives you a 35% chance of spell failure, while a 25 pound chainmail shirt gives you a 20% chance of spell failure, then you can probably assume that 4-5 grams is small enough not to bother tracking.

As an analogy, think of the way rubber shoes can help insulate you from electricity. But if you get struck by lightning, a pair of rubber socks aren't going to make any noticable difference.

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#23 Postby SeeleyOne » Tue Oct 09, 2012 5:27 pm

Thanks, Zadmar, I was wondering about that (being the actual amount of iron in the body).

I am wanting iron to mess with magic, kind of like a power surge or something. It would give Arcane Resistance for a wearer of chain mail, and perhaps Improved Arcane Resistance for full plate armor. I have to sit down and look at the numbers, but that is the off-hand gist of it,
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#24 Postby Cryonic » Tue Oct 09, 2012 9:24 pm

Zadmar wrote:
Cryonic wrote:If iron interferes with spellcasting, then nothing with hemoglobin (oxygen carrier in most creatures blood) can cast spells as blood uses iron to loosely attach with oxygen.

It really depends how much it interferes. The human body usually contains around 4-5 grams of iron, which would be about the same as having a few safety pins in your shirt, and considerably less than wearing a watch or belt buckle. If you're ruling that a 50 pound suit of full plate armour gives you a 35% chance of spell failure, while a 25 pound chainmail shirt gives you a 20% chance of spell failure, then you can probably assume that 4-5 grams is small enough not to bother tracking.

As an analogy, think of the way rubber shoes can help insulate you from electricity. But if you get struck by lightning, a pair of rubber socks aren't going to make any noticable difference.


True... but the example you cite isn't because of iron in the armor... The rules for the suits in D&D are because they interfere with manual dexterity (ability to finely position various joints).

And in the case of iron in the blood, it is dispersed everywhere and like a small amount of unnatural fiber to Harry, would therefore cause interference.

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#25 Postby SeeleyOne » Tue Oct 09, 2012 9:36 pm

Cryonic wrote:And in the case of iron in the blood, it is dispersed everywhere and like a small amount of unnatural fiber to Harry, would therefore cause interference.

Perhaps that is why mages are rare. Many settings have it where there is a sort of magical aptitude, which is an inherent gift for magic. Maybe the iron in the blood is why not everybody can cast spells. Some people, those with mage blood, perhaps have something that counteracts the anti-magic in their own blood's iron. Maybe midichlorians (or however they spelled it in Star Wars) :razz:

Anyway, I am really liking this discussion. It is helping me to shape the nature of magic for my setting. And I am sure that it is probably helpful to other people that might lurk in this thread. I like making things, even magic, to make sense at least to a certain degree.
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#26 Postby Snate56 » Fri Oct 12, 2012 3:23 pm

Cryonic wrote:If iron interferes with spellcasting, then nothing with hemoglobin (oxygen carrier in most creatures blood) can cast spells as blood uses iron to loosely attach with oxygen.


Way too small an amount of iron, we're talking about heavy concentrations as in chainmail or plate.

Though mostly used as a game balancer, in folklore, cold iron has been the antithesis to magic and magical creatures such as fey beings.
Iron is considered to be the bones and blood of the Earth and as such has power over all things magical and supernatural. Current day witches (and historical) place their hands on the earth to "ground" themselves of excess energy.

Sorry, probably TMI :lol:

And I'll bet Harry would be happy to wear a Kevlar vest, if he were facing mainly gun weilding opponents.

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#27 Postby ValhallaGH » Sun Oct 14, 2012 12:52 pm

Carlos Ramirez favored Kevlar, lacking a fancy duster. :wink:


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