Stacking / overlapping Damage Reduction?


Rules Questions

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This might be a topic that has already been discussed and/or clarified in the past, but I tried a quick search and couldn't find anything on it, so here goes: does DR stack, and if not, which one applies if you get DR from two sources? For example, if I have a high-level invulnerable rager barbarian with the fiendish template, does it have DR 10/good or DR X/-, or both? Or would you get the "best of both worlds", i.e. DR 10/-? How does it work if you get two types of DR; do they stack or overlap?


Apply the best one against any particular attack that hits. For example, if you have DR 10/good and DR x/-, assuming the x < 10, you would apply 10/good against most attacks. You would apply the x/- against any good attack that bypasses the 10/good.

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Bill Dunn wrote:
Apply the best one against any particular attack that hits. For example, if you have DR 10/good and DR x/-, assuming the x < 10, you would apply 10/good against most attacks. You would apply the x/- against any good attack that bypasses the 10/good.

Hmmm... what you say makes sense, but I don't think I've seen it like that anywhere; speaking of stat blocks, that is. Do you write it down like 'DR 10/good or DR X/-' or 'DR 10/good (DR X/-)'?


You would write it as, for example, "DR 10/good and DR 5/-".

Bestiary creatures with DR requiring multiple qualities to completely overcome tend to have them with the same amount (instead of two different numbers), so they're written as "DR 10/cold iron and good", for instance.

Edit: Be aware that if a statblock writes "DR 10/cold iron or good" (instead of "and"), then attacks with either quality would completely overcome the DR.


Aaaallrighty!

Ladies and gentlemen!

I have an interesting question when it comes to DR, since I have something else. Right now, mz 15th level Fighter wear Adamantine Full Plate that grants DR 3/-. On 19th level, mz Fighter gains Armor Mastery, which gives DR 5/-. Can they stack, since thez are both the same Dr that can't be bypassed (only with Smite Evil), or I must take the better DR?


Base fighter no archetype, Armor Mastery ability doesn't stack with anything (DR does not normally stack). So you're adamantine armor which normally provides DR3/- still exist, and your Armor Mastery ability provides Dr5/-. They do not stack and are different sources.

If you had taken the Armor Master archetype and received the Armor Defense ability it would stack since the ability explicitly states that it stacks with the DR provided by adamantine armor. So, at 19th level in heavy adamantine armor you would have DR 15/-.

Armored Defense (Ex) wrote:

At 5th level, an armor master gains DR 1/— when wearing light armor, DR 2/— when wearing medium armor, and DR 3/— when wearing heavy armor. At 19th level, this damage reduction increases to DR 4/— when wearing light armor, DR 8/— when wearing medium armor, and DR 12/— when wearing heavy armor. This damage reduction stacks with that provided by adamantine armor, but not with other forms of damage reduction. This damage reduction does not apply if the armor master is stunned, unconscious, or helpless.

This ability replaces weapon training 1 and 3, and armor mastery.


Claxon wrote:

Base fighter no archetype, Armor Mastery ability doesn't stack with anything (DR does not normally stack). So you're adamantine armor which normally provides DR3/- still exist, and your Armor Mastery ability provides Dr5/-. They do not stack and are different sources.

If you had taken the Armor Master archetype and received the Armor Defense ability it would stack since the ability explicitly states that it stacks with the DR provided by adamantine armor. So, at 19th level in heavy adamantine armor you would have DR 15/-.

Armored Defense (Ex) wrote:

At 5th level, an armor master gains DR 1/— when wearing light armor, DR 2/— when wearing medium armor, and DR 3/— when wearing heavy armor. At 19th level, this damage reduction increases to DR 4/— when wearing light armor, DR 8/— when wearing medium armor, and DR 12/— when wearing heavy armor. This damage reduction stacks with that provided by adamantine armor, but not with other forms of damage reduction. This damage reduction does not apply if the armor master is stunned, unconscious, or helpless.

This ability replaces weapon training 1 and 3, and armor mastery.

That's brutal. But I'm fine with my old-school fighter class, with bravery, weapon training and other, so it looks I have to find, for example, Mithral Full Plate to lower my Armor Check penalty when I get Armor Mastery. That would give my fighter more mobility, and Mithral Full Plate is twice easier to carry than Adamantine one.


DR does not stack. You take the greatest, unless the rules specify otherwise. If you have DR 5/slashing and DR 10/good and someone attacks you with a non-aligned mace. You have DR 10


Thanks digitalpacman, but I figured it out already. Thanks anyway :)

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