To me the most important bit was [Gil's Actually Good At Something! Skill Bonus!] to sword-related [Telekinesis].
Weapon Crafting
Okay here's the crafting system I made up for weapons. It will be
similar to the system for crafting equipment like armor, and there will be some Venn-diagram overlap between this and [Building stuff].
So in canon, or rather, on
Lisbeth's character sheet, the skills I'm thinking about right now are:
[Slash Weapon Forging]
[Thrust Weapon Forging]
[Blunt Weapon Forging]
[Metal Refining]
(This is where the Venn overlap with the [Building Stuff] rules comes into play: both [Metal Refining] and [Smelting] (from 6.1) can be used to turn Metal Ore => Metal Ingots (or whatever); but [Smelting] is like 1,000x more productive in time/results ratio, while [Metal Refining] can be used to improve the quality of Ingots).
(Liz also had [Metal Equipment Repairing], [Light Metal Armor Forging], and [Heavy Metal Armor Forging], but I'll set those aside for now).
Player Inputs
When designing a weapon, Players designate:
1) Applicable Skill
Which [Weapon Skill] the weapon is intended to be used with. Used by Cardinal's procedural generator system as an input.
2) Length
The overall length of the weapon. Deviation from the "default" value based on the input [Weapon Skill] is a function of [Forging Skill(s)]. Inter-related with [Mass].
3) Mass (with inputs)
How much the weapon weighs, or more precisely, how much it masses. Deviation from the "default" value based on the input [Weapon Skill] is a function of [Forging Skill(s)]. Inter-related with [Length].
The player has to drop an appropriate amount of material (Iron, Bronze, Stone, wood, whatever) into a composition window to produce the weapon. As a limit, no more than 255 different items can be used as inputs, and their total mass (incremented in milligrams) has to add up to total mass of the weapon.
There are a few "recipes" available from NPCs, and a few well-known common pitfalls; if an appropriate fraction of a spear or axe isn't wood or some other "handle material", or the player hasn't increased the mass ratio relative to the length, then the result won't be a failure... technically. It'll have weird proportions. But in general you just put in the best-quality metal you can.
...In the beta the playerbase had just started finding "magical" metals that could make your weapon fire-aspected, or gave a bonus to stats, but those materials have all been disabled by Kayaba (although
creating such materials is a valid use of [Magecraft]).
Something like [Low Quality Iron] has a weight in your inventory, so you can decrement it and, like, shave off a few milligrams for a weapon.
...Because Shirou has maxed out his Structural Grasp until it's so hax he's basically cheating, he can even look at the underlying randomly-generated properties of the input items. This he could theoretically have an item input window that lists like, twelve
different pieces of [Low Quality Iron] in arbitrary-looking fractions, but that's because he's min-maxing the "impurities" to get exactly the right percentages that he needs; just like IRL, the goal is to get the perfect wt% of adjutants rather than making your iron "pure". He'll even commit the heresy of using [Ultra Pure Iron] and [Low Quality Iron] at the same time, for that reason.
4) Parameters
Just like they could have chosen from five different values for [Weapon Enhancement] before Kayaba threw that out, (and still can do so with [Reinforcement] and similar spells), Weapon Smiths designate the following five attributes as a percentage (default 20% each):
Sharpness
Quickness
Accuracy
Heaviness
Durability
These are what the weaponsmith chooses as being "important" or "distinctive" about the weapon.
(I got the idea for that from a throwaway line that Liz focused on Sharpness + Accuracy originally to max out DPS so battles would end faster, but balanced with Durability after Kirito broke her best sword so that her blades wouldn't fail her customers when they needed them; I wanted a system that made such things clear and concrete).
Distinction: While "Mass" represents how much the item weighs, high "Heaviness" compared to that implies, to me, a longer
moment arm on the weapon, so that it has higher rotational inertia. This is, on inspection, also exactly what "Quickness" is measuring?
5) Once all the design inputs are selected, the Player materializes an "ingot", whacks it ten times with their [Hammer] (each whack is a [Skill Check] vs the [Forging] Skill), and then after that, out pops the weapon!
...During one of the [Floor Patches], a new pop-up was added at the end, so that Smiths could replace the [Autoname] with whatever input they wanted; any player with [Metal Equipment Reparing] can pull that back up to re-name an item, but all previous names are retained and can be discovered with [Appraise] Skill or [Structural Grasp].
...Shirou will number all swords he produces sequentially, unless a customer ordering a bespoke sword has a preference. By contrast, Liz accepts the [Autoname] unless something better occurs to her. It's a rule at [Takachan's Emporium] that all guild members will rename any item for free (NPCs charge), as a way to get customers in the door.
Anecdote Time
Also, this might just be related to the "research" I did for
Part 6.1, but while playing Minecraft, after I dug up my first iron ore, I was like, "okay! Obviously I have to convert this to iron, probably by feeding it into a blast furnace or something." (Really you just use that oven thing).
Then when I got my iron, I immediately cooked it again (this time with charcoal, because charcoal burns hotter than wood, and a higher-temp burn means I could up the Carbon Monoxide content with oxygen starvation, which made me wonder if Minecraft has asphyxiation rules because I was doing this in an enclosed space), because obviously I wanted to make STEEL.
Well, that didn't work. "I know! I'll try and build a
BESSEMER CONVERTER."
Well, that didn't work.
Finally in disgust I went to google to find out how to make steel in Minecraft.
Spoilers: You DON'T.
Anyway,
This is your Mind, on Steel
In the next section I want Shirou to be the one to "invent" [Steel] as a material by adding a carbon-source (he'll drag Liz off and start a forest fire or something), but that only works if Shirou is in the same place as me mentally: OBVIOUSLY the next step is to add a carbon impurity to your high-purity iron... but it's not obvious to anyone else at all.
So proximately, I want to ask:
When I described the "mass-fraction" way to make swords, did you immediately think "oh! Then I should add 2 %wt charcoal to my iron to make STEEL", or not? Because that gag with Liz won't work unless most people
didn't immediately think "STEEL TIME."