How much would an antimagic sword cost.

[the David]

I was wondering if anyone had ever made an antimagic sword. My idea is to not make a spell-in-a-can version, but just a sword that ignores all magic. It's essentially a double edged blade (sorry) though, as the wielder won't be able to use any magic on the sword. This includes enhancement bonii, spellstrike, teleportation magic and anything else you could think of.

I want to know if I should try to figure out a price for this weapon, or should I just call it a minor artifact and be done with it. I'd also like to know if this is a terrible campaign ending idea.

[Pizza Lord]

It really depends on the implementation. Ignoring all magic isn't really artifact level power in my opinion, but that's just me going by your wording. Assuming the sword is just basically golem-level magic immunity and insurmountable SR and basically unaffected by magic attacks... then that's probably fine. If you mean that it can still damage creatures with DR as though it was magic or can harm incorporeal creatures or can cut through magic defenses or just pass through a force wall because it isn't affected (as opposed to passing through a normally traversible wall, like wall of fire and just taking no magical fire damage), then yes, that would likely be minor artifact level.

Even then... allowing the sword to ignore purely magical barriers might still be within non-artifact range assuming it doesn't grant its wielder the same ability. Ie. just because it can go through the barrier doesn't mean the wielder can, or if the wielder teleports or dimension doors it stays behind (it doesn't stop them from flying magically and carrying it, but it might just drop through a floating disk) then that's probably okay, power-wise. You would need to decide how it interacts with other magical reactions. Does it meld with the wielder's form if they polymorph or does it remain behind (assuming the new form can't wield it)? Does it increase in size like the rest of the wielder's gear if they enlarge? Also, you'd need to realize that it won't benefit from protections the wielder receives, so if they get fire resistance or immunity magically (which tends to protect the target of the spell's gear as well) and they go wading through a non-magical lava bed... it will probably take damage and melt like an ordinary sword would if damaged (notwithstanding a higher hardness and hit points for having any 'technical' enhancement bonus which just may not be applying but exist for magical item building purposes and crafting costs).

Even then, there's nothing wrong with making a fully magic-proof item... you just need to have your campaign and game be ready for it. I doubt it would end the campaign unless you just decided willy-nilly to drop one in and 'see what happens'. In that case, it falls under the typical artifact clause: 'It shouldn't show up without a reason.'

[Claxon]

My understanding of what the OP wants, is that they want a sword that effectively produces the spell Antimagic Field, centered on the weapon. If that's the case, I'd call it an artifact. Although, what they make it sound like they don't want that, their description makes it sound like Antimagic Field is the closest thing.

Because what would it even mean to "ignore spellstrike" or "ignore teleportation magic". The sword itself can't teleport? Can the wielder? Can someone within 10ft of the sword?

OP, you really need to lay out more clearly what kind of effect you're looking for exactly.

[the David]

What I meant was that the sword has antimagic properties, but it doesn't emanate an antimagic field. In other words, it's a sword with a sword sized antimagic field. This means that it would ignore the enhancement bonus from magical shields and armor, but it could never be enchanted. A magus wouldn't be able to deliver spells through the sword. It would be able to ignore a wall of force, but its wielder would still be stuck on one side of the wall. Summoned creatures are likewise immune to the sword. An opponent won't be able to use disintegrate on your sword, but you won't be able to cast any buff spells on your sword.

Does that make any sense?

Edit: Oh right, the teleport thing. The wielder can teleport, the sword can't. This means that if the wielder would try to teleport with the sword, he'd lose his sword.

[Claxon]

Well, if it works like anitmagic field, wall of force stops antimagic field.

Honestly...it's more troublesome it how to determine what happens if the sword only exhibits an "antimagic field the exact size of the sword" because there's stuff that's unclear what should happen.

Like, what about a summoned creature? Summoned creature normally wink out in an antimagic field, what happens if the sword is used against them? Extra damage? No damage? Do they wink out? Do they come back after the attack? How long, immediately after pr the next round?

If it's only the exact size of the the sword, does it make sense for it to negate magical bonuses of armor or shields it hits? In my opinion it doesn't. The field doesn't extend into the object it's hitting.

Either way, I think the object your attempting to describe, whatever it's final properties are, is best represented as an artifact.

[Kayerloth]

Reminds of a Brilliant Energy weapon. Similar bunch of questions regarding its behavior when used. Not sure it's an artifact level thing but some of that depends on how those questions get answered. Brilliant Energy is a +4 property so while not artifact level it certainly isn't minor either. Easiest thing would be simply assume any interaction as if the sword is in an antimagic field. Swing at something Summoned and the sword passes through harmlessly (literally winking the creature out as it passes thru). It has no + (beyond MW?) so can't beat DR but then again what is it made of ... Adamantine? Is its Antimagic property something which can be suppressed or dispelled? What happens if the local Lich hits it with Mages Disjunction? Or the owner finds themselves within a Prismatic Sphere or walking thru a Prismatic Wall of their own casting?