Adamantine Weapon vs Creature Hardness


Rules Questions

Liberty's Edge

2 people marked this as FAQ candidate.

I was thinking that the ability of Adamantine Weapons to bypass hardness applied to objects and creatures. I was looking at adamantine today and noticed it only specified objects.

Was I just initially mistaken?

Edit: I was specifically curious about adamantine and construct hardness.

Pathfinder PRD wrote:

Mined from rocks that fell from the heavens, this ultrahard metal adds to the quality of a weapon or suit of armor. Weapons fashioned from adamantine have a natural ability to bypass hardness when sundering weapons or attacking objects, ignoring hardness less than 20. Armor made from adamantine grants its wearer damage reduction of 1/— if it's light armor, 2/— if it's medium armor, and 3/— if it's heavy armor. Adamantine is so costly that weapons and armor made from it are always of masterwork quality; the masterwork cost is included in the prices given below. Thus, adamantine weapons and ammunition have a +1 enhancement bonus on attack rolls, and the armor check penalty of adamantine armor is lessened by 1 compared to ordinary armor of its type. Items without metal parts cannot be made from adamantine. An arrow could be made of adamantine, but a quarterstaff could not.

Weapons and armor normally made of steel that are made of adamantine have one-third more hit points than normal. Adamantine has 40 hit points per inch of thickness and hardness 20.


Creatures do not usually have hardness. If one does, apply adamantine until creature is now a pile of objects. In other words: If it has hardness, of less than 20, adamantine cuts through it. When adamantine was created as a material in D&D, there were exactly zero creatures that had hardness instead of DR, so there was no reason to put in a line that it effected them as well.

Liberty's Edge

Well, I was specifically asking because I'm playing in the Iron Gods AP, I have an Adamantine Sword but my GM was saying since it specifically says "objects" that it wouldn't apply.

But I've seen people on here talk about using Adamantine to fight robots.

I was trying to find a ruling (or a dev post, errata, FAQ, etc) that says that Adamantine applies to creature hardness. If such a thing exists.


Some monsters - notably objects animated with the animate objects spell or permanent animated objects using the same rules, plus a few others - can have actual hardness, but it's not super common. Animated objects, robots - I can't think of any other examples off the top of my head, actually.

Overall it is much more common for monsters to have damage reduction than hardness, but for golems and clockwork creatures and the like, that damage reduction does tend to be DR/adamantine anyway.

Spoiler:
Nocte, it's a bit obscure, but animated objects had hardness in prior iterations of 3.x as well

Grand Lodge

How does your DM expect you to deal with hardness?


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Here you go, a post from James Jacobs: LINK

James Jacobs wrote:
John Spalding wrote:

If robots aren't objects, then RAW would say that adamantine weapons won't ignore the hardness. You ignore hardness when sundering or attacking an object.

I guess I am wondering, from a designer perspective, is this a feature or a bug?

A bug. The description of how adamantine weapons bypass hardness should say "...when attacking creatures or objects with hardness..." or the like.


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I don't think the devs ever considered that someone would interpret creature!hardness as working differently from object!hardness, considering that the only creatures that have hardness are those that are also objects.

Hardness is only defined in the rules in terms of its effects on objects. So, your GM is saying that the rule for adamantine ignoring hardness is a rule about objects and not about creatures. Well, by the same argument, the rule for subtracting hardness from damage dealt to objects is a rule about objects and not about creatures. If he looks in the universal monster rules, and in the specific rules of the robots, there's no rule saying to deduct hardness from damage, so unless he's applying the rules from attacking objects in the CRB, he shouldn't be doing that either.

Of course, this may not sway him if he's convinced this is the way it's supposed to be, but you might be able to make the point to him if you ask him to show you the rule that hardness decreases the damage done to robots and other such creatures, without reference to the Additional Rules chapter of the CRB.

Grand Lodge

Paladin of Baha-who? wrote:

I don't think the devs ever considered that someone would interpret creature!hardness as working differently from object!hardness, considering that the only creatures that have hardness are those that are also objects.

Hardness is only defined in the rules in terms of its effects on objects. So, your GM is saying that the rule for adamantine ignoring hardness is a rule about objects and not about creatures. Well, by the same argument, the rule for subtracting hardness from damage dealt to objects is a rule about objects and not about creatures. If he looks in the universal monster rules, and in the specific rules of the robots, there's no rule saying to deduct hardness from damage, so unless he's applying the rules from attacking objects in the CRB, he shouldn't be doing that either.

Of course, this may not sway him if he's convinced this is the way it's supposed to be, but you might be able to make the point to him if you ask him to show you the rule that hardness decreasaes the damage done to robots and other such creatures, without reference to the Additional Rules chapter of the CRB.

Is this actually stated or are you drawing that conclusion because it's only things like golems that have hardness?


DR - for creatures.
Hardness - for objects.

Some creatures have HARDNESS instead of DR (animated objects).
If You hit them with admantine sword - You will bypass the hardness, that is less then 20.

Also You can bypass DR/Adamantine.

Why DM thinks, that you can bypass the hardness of statue that is NOT alive, and absolutely can not bypass hardness of the SAME statue, beacuse it was animated round ago?


I'd just like to point out that under the "Breaking and Entering" section (which is what people seem to be referencing when dealing with objects and hardness), there is a subheader "Animated Objects". The only line in that paragraph is

Damaging Objects, Animated Objects wrote:
Animated objects count as creatures for purposes of determining their Armor Class (do not treat them as inanimate objects).

Seems to at least strongly imply that Animated Objects are still objects, that also happen to be creatures.


There's no rule stating that Creature and Object are mutually exclusive. Creature is defined as "an active participant in the story or world", but "object" is not mechanically defined; thus we must resort to the standard English definition, which is "anything that is visible or tangible and relatively stable in form." By that definition, nearly all creatures, from Humanoids to Constructs to Dragons, would also be considered Objects. Incorporeal creatures would be creatures, but not objects. Thus, adamantine's ability to bypass hardness would still affect creatures with hardness except for the very unlikely scenario of an incorporeal creature with hardness.


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The issue comes up because objects with hardness divide energy damage in half. Creatures such as constructs do not.

And an animated object is a construct that has hardness, such as a brass juggernaut. However, a brass man construct is not an animated object, and has DR. Robots have hardness, golems have DR.

Yeah, they should fix this.

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