The Dresden Files > DFRPG
Need advice on a fire-based defense
Lanodantheon:
My brother Arandmoor's character, The Archivist, has a fire shield rote. His take on it relates to his aspect, My Deep-Dark Secret.
His Fire Shield uses the Cleansing Power of Fire to cleanse away negative possible outcomes. it's an area of very3 Grey magic, but it relates to My Deep-Dark Secret
PapaBear:
--- Quote from: Lanodantheon on May 06, 2010, 04:56:25 PM ---My brother Arandmoor's character, The Archivist, has a fire shield rote. His take on it relates to his aspect, My Deep-Dark Secret.
His Fire Shield uses the Cleansing Power of Fire to cleanse away negative possible outcomes. it's an area of very3 Grey magic, but it relates to My Deep-Dark Secret
--- End quote ---
Sorry, my head isn't wrapping around this shield all that well. So its essentially a probability spell that uses fire magic to affect the probability of negative outcomes? That has a Scarlet Witch vibe to it, which is neat.
Deadmanwalking:
Yeah, I'm betting his secret is Chronomancy.
PapaBear:
--- Quote from: Deadmanwalking on May 07, 2010, 06:18:03 AM ---Yeah, I'm betting his secret is Chronomancy.
--- End quote ---
Heh. Ooh! A chronomantic shield would be fun. A disk of energy that sends objects that pass through it several seconds into the future. You'd have to move out of the way every time something went through, but it'd be neat. But if you add in some wind or force magic to displace space as well as time, it would be pretty damn effective. And probably really costly, energy wise.
On a more on topic note:
--- Quote from: paul_Harkonen on May 06, 2010, 03:38:28 AM ---Depending on how you (or more precisely your character) views the source of their pyromancy. If it's simply and ability to control fire, then the wall of fire, or a glaring light, or things of that nature make sense.
If, on the other hand, it has more to do with converting things to heat (at it's core fire is just transfering one kind of energy into heat) then a shield that converts the kinetic energy of bullets into heating the air (either by stopping them while the air heats up, or by vaporizing them) makes perfect sense. And it would be really cool, the bullets simply stop and the air around you heats up making you even more frightening (to them).
--- End quote ---
You could also take the heat you generate and dump it into the shield. So a) you stop the projectiles movements, and b) you burn up the projectiles, rendering them useless for future use.
crusher_bob:
For anyone interested in monitoring how much heat it actually takes to stop stuff here's some math:
We'll use as our point of comparison, a coke can full of water (250 mL).
Since you have been holding it in your hand for a long time, the water is at body temperature (37 C)
The specific heat of water is 4.186 J/g per C, so it would take around 1046.5 Joules to heat up your can of water 1 C.
So how much energy is ~1000 Joules you ask?
A 9mm pistol bullet is around 500J, a big pistol bullet (~.44 magnum) is around 1000 joules, a rifle bullet (7.62 Soviet) is around 2000 joules.
So if our heat based shield is based off taking the energy out of the bullets (so they come to a complete stop in mid-air) and just fall down) and transferring that energy into our coke can.
So assuming our heat shield is 100% efficient, and some bad buy empties all 30 rounds of his AK into our heat shield, your coke can full of water goes to ~97 C, not even boiling yet. But certainly hot enough to burn you if you holding it. (Somewhere around 45-50 C is hot enough to scald your skin). A magazine full of fire from a pistol (15 rounds of 9mm) is only enough to raise the temp of our coke can is barely enough heat to raise it from body temperature to hot enough to scald you.
So what do we learn from this? Enchanted cans of Coke that provide you a fire based defensive shield that stops bullets can totally be tapped from cool and refreshing drink afterwards, as long as you don't get shot too much. ;D
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