Is it possible to increase the AC of a mirror image duplicate?











up vote
13
down vote

favorite












Pretty straight forward question. By RAW, is it possible to increase the AC of the duplicates created by mirror image or they will always have an AC equal to 10 + Dex modifier? Be it using other spells, magic items or other effects.










share|improve this question






















  • [Related] Is the AC of a Mirror Image Duplicate fixed at Point of Casting?
    – SevenSidedDie
    Nov 21 at 16:53















up vote
13
down vote

favorite












Pretty straight forward question. By RAW, is it possible to increase the AC of the duplicates created by mirror image or they will always have an AC equal to 10 + Dex modifier? Be it using other spells, magic items or other effects.










share|improve this question






















  • [Related] Is the AC of a Mirror Image Duplicate fixed at Point of Casting?
    – SevenSidedDie
    Nov 21 at 16:53













up vote
13
down vote

favorite









up vote
13
down vote

favorite











Pretty straight forward question. By RAW, is it possible to increase the AC of the duplicates created by mirror image or they will always have an AC equal to 10 + Dex modifier? Be it using other spells, magic items or other effects.










share|improve this question













Pretty straight forward question. By RAW, is it possible to increase the AC of the duplicates created by mirror image or they will always have an AC equal to 10 + Dex modifier? Be it using other spells, magic items or other effects.







dnd-5e spells armor-class






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 19 at 22:29









Kuerten

362114




362114












  • [Related] Is the AC of a Mirror Image Duplicate fixed at Point of Casting?
    – SevenSidedDie
    Nov 21 at 16:53


















  • [Related] Is the AC of a Mirror Image Duplicate fixed at Point of Casting?
    – SevenSidedDie
    Nov 21 at 16:53
















[Related] Is the AC of a Mirror Image Duplicate fixed at Point of Casting?
– SevenSidedDie
Nov 21 at 16:53




[Related] Is the AC of a Mirror Image Duplicate fixed at Point of Casting?
– SevenSidedDie
Nov 21 at 16:53










2 Answers
2






active

oldest

votes

















up vote
20
down vote



accepted










The only way to do so is to increase your DEX modifier.



The spell clearly states:




A duplicate's AC equals 10 + your Dexterity modifier.




This is very explicit. D&D operates under the rule of "Specific Beats General" (PHB p. 7), meaning that in this case, you could change the formula if you found a feature that explicitly changed the AC of a Mirror Image illusion, or generally changed the AC of any illusion created by the caster.



However, to my knowledge, there is no feature or ability in any of the official rulebooks that I can think of that would have such an effect. The most likely place to find such a feature would be an illusion wizard's class features, but they disappoint in this regard.



Hence, the AC will always be calculated as $left(10 + DEXright)$, and since 10 is obviously constant, the only possibility left is to increase your DEX modifier. You can do that for example with ASIs you get from leveling up, equipping items that raise your DEX stat, or using magic items that permanently raise your DEX.



Examples for such items would be an Ioun Stone (raises DEX by 2, up to 20, while worn) or the Manual of Quickness of Action (permanently raises DEX & maximum DEX score by 2).





You can also hide your duplicates behind cover to increase their AC.



Half cover increases their AC by 2, while 3/4 cover increases it by 5. They are valid for the Cover rules (PHB p. 196), since those reference targets in general - not just creatures.



See Mark Wells' answer for details.






share|improve this answer






























    up vote
    14
    down vote













    Hide behind something.



    Partial cover provides a direct bonus of +2 to +5 AC. The illusions follow wherever you go, so they'll follow you behind cover.



    Other than that, not really.



    They're not solid, so they can't wear armor. (If the caster wears armor, they will have illusory armor, but it doesn't help them.)



    They're not real creatures, so they don't benefit from spells like mage armor and barkskin that are designed to work on creatures.



    They aren't monks or barbarians so they don't get Unarmored Defense.



    Making them invisible / turning off the lights will make them entirely impossible to hit, since they're just visual illusions, but that's not a change in AC.






    share|improve this answer



















    • 2




      Your point about turning off the lights raises a question about mirror image working in the dark. They don't make any sound so are unlikely to be an actual distraction when you can't see them!
      – SeriousBri
      Nov 20 at 7:37






    • 4




      The spell actually mentions that creatures that can't see are unaffected by the spell, so turning off the lights won't help.
      – Erik
      Nov 20 at 11:07






    • 2




      @Erik: Well, from a technical point of view, the fact that enemies are not being affected by the spell reduces the mirror image's chance to be hit even more drastically...
      – mlk
      Nov 20 at 14:31











    Your Answer





    StackExchange.ifUsing("editor", function () {
    return StackExchange.using("mathjaxEditing", function () {
    StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
    StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["\$", "\$"]]);
    });
    });
    }, "mathjax-editing");

    StackExchange.ready(function() {
    var channelOptions = {
    tags: "".split(" "),
    id: "122"
    };
    initTagRenderer("".split(" "), "".split(" "), channelOptions);

    StackExchange.using("externalEditor", function() {
    // Have to fire editor after snippets, if snippets enabled
    if (StackExchange.settings.snippets.snippetsEnabled) {
    StackExchange.using("snippets", function() {
    createEditor();
    });
    }
    else {
    createEditor();
    }
    });

    function createEditor() {
    StackExchange.prepareEditor({
    heartbeatType: 'answer',
    convertImagesToLinks: false,
    noModals: true,
    showLowRepImageUploadWarning: true,
    reputationToPostImages: null,
    bindNavPrevention: true,
    postfix: "",
    imageUploader: {
    brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
    contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
    allowUrls: true
    },
    noCode: true, onDemand: true,
    discardSelector: ".discard-answer"
    ,immediatelyShowMarkdownHelp:true
    });


    }
    });














    draft saved

    draft discarded


















    StackExchange.ready(
    function () {
    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2frpg.stackexchange.com%2fquestions%2f135926%2fis-it-possible-to-increase-the-ac-of-a-mirror-image-duplicate%23new-answer', 'question_page');
    }
    );

    Post as a guest















    Required, but never shown

























    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes








    up vote
    20
    down vote



    accepted










    The only way to do so is to increase your DEX modifier.



    The spell clearly states:




    A duplicate's AC equals 10 + your Dexterity modifier.




    This is very explicit. D&D operates under the rule of "Specific Beats General" (PHB p. 7), meaning that in this case, you could change the formula if you found a feature that explicitly changed the AC of a Mirror Image illusion, or generally changed the AC of any illusion created by the caster.



    However, to my knowledge, there is no feature or ability in any of the official rulebooks that I can think of that would have such an effect. The most likely place to find such a feature would be an illusion wizard's class features, but they disappoint in this regard.



    Hence, the AC will always be calculated as $left(10 + DEXright)$, and since 10 is obviously constant, the only possibility left is to increase your DEX modifier. You can do that for example with ASIs you get from leveling up, equipping items that raise your DEX stat, or using magic items that permanently raise your DEX.



    Examples for such items would be an Ioun Stone (raises DEX by 2, up to 20, while worn) or the Manual of Quickness of Action (permanently raises DEX & maximum DEX score by 2).





    You can also hide your duplicates behind cover to increase their AC.



    Half cover increases their AC by 2, while 3/4 cover increases it by 5. They are valid for the Cover rules (PHB p. 196), since those reference targets in general - not just creatures.



    See Mark Wells' answer for details.






    share|improve this answer



























      up vote
      20
      down vote



      accepted










      The only way to do so is to increase your DEX modifier.



      The spell clearly states:




      A duplicate's AC equals 10 + your Dexterity modifier.




      This is very explicit. D&D operates under the rule of "Specific Beats General" (PHB p. 7), meaning that in this case, you could change the formula if you found a feature that explicitly changed the AC of a Mirror Image illusion, or generally changed the AC of any illusion created by the caster.



      However, to my knowledge, there is no feature or ability in any of the official rulebooks that I can think of that would have such an effect. The most likely place to find such a feature would be an illusion wizard's class features, but they disappoint in this regard.



      Hence, the AC will always be calculated as $left(10 + DEXright)$, and since 10 is obviously constant, the only possibility left is to increase your DEX modifier. You can do that for example with ASIs you get from leveling up, equipping items that raise your DEX stat, or using magic items that permanently raise your DEX.



      Examples for such items would be an Ioun Stone (raises DEX by 2, up to 20, while worn) or the Manual of Quickness of Action (permanently raises DEX & maximum DEX score by 2).





      You can also hide your duplicates behind cover to increase their AC.



      Half cover increases their AC by 2, while 3/4 cover increases it by 5. They are valid for the Cover rules (PHB p. 196), since those reference targets in general - not just creatures.



      See Mark Wells' answer for details.






      share|improve this answer

























        up vote
        20
        down vote



        accepted







        up vote
        20
        down vote



        accepted






        The only way to do so is to increase your DEX modifier.



        The spell clearly states:




        A duplicate's AC equals 10 + your Dexterity modifier.




        This is very explicit. D&D operates under the rule of "Specific Beats General" (PHB p. 7), meaning that in this case, you could change the formula if you found a feature that explicitly changed the AC of a Mirror Image illusion, or generally changed the AC of any illusion created by the caster.



        However, to my knowledge, there is no feature or ability in any of the official rulebooks that I can think of that would have such an effect. The most likely place to find such a feature would be an illusion wizard's class features, but they disappoint in this regard.



        Hence, the AC will always be calculated as $left(10 + DEXright)$, and since 10 is obviously constant, the only possibility left is to increase your DEX modifier. You can do that for example with ASIs you get from leveling up, equipping items that raise your DEX stat, or using magic items that permanently raise your DEX.



        Examples for such items would be an Ioun Stone (raises DEX by 2, up to 20, while worn) or the Manual of Quickness of Action (permanently raises DEX & maximum DEX score by 2).





        You can also hide your duplicates behind cover to increase their AC.



        Half cover increases their AC by 2, while 3/4 cover increases it by 5. They are valid for the Cover rules (PHB p. 196), since those reference targets in general - not just creatures.



        See Mark Wells' answer for details.






        share|improve this answer














        The only way to do so is to increase your DEX modifier.



        The spell clearly states:




        A duplicate's AC equals 10 + your Dexterity modifier.




        This is very explicit. D&D operates under the rule of "Specific Beats General" (PHB p. 7), meaning that in this case, you could change the formula if you found a feature that explicitly changed the AC of a Mirror Image illusion, or generally changed the AC of any illusion created by the caster.



        However, to my knowledge, there is no feature or ability in any of the official rulebooks that I can think of that would have such an effect. The most likely place to find such a feature would be an illusion wizard's class features, but they disappoint in this regard.



        Hence, the AC will always be calculated as $left(10 + DEXright)$, and since 10 is obviously constant, the only possibility left is to increase your DEX modifier. You can do that for example with ASIs you get from leveling up, equipping items that raise your DEX stat, or using magic items that permanently raise your DEX.



        Examples for such items would be an Ioun Stone (raises DEX by 2, up to 20, while worn) or the Manual of Quickness of Action (permanently raises DEX & maximum DEX score by 2).





        You can also hide your duplicates behind cover to increase their AC.



        Half cover increases their AC by 2, while 3/4 cover increases it by 5. They are valid for the Cover rules (PHB p. 196), since those reference targets in general - not just creatures.



        See Mark Wells' answer for details.







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Nov 22 at 1:23









        V2Blast

        18.8k251117




        18.8k251117










        answered Nov 19 at 22:43









        PixelMaster

        8,0823089




        8,0823089
























            up vote
            14
            down vote













            Hide behind something.



            Partial cover provides a direct bonus of +2 to +5 AC. The illusions follow wherever you go, so they'll follow you behind cover.



            Other than that, not really.



            They're not solid, so they can't wear armor. (If the caster wears armor, they will have illusory armor, but it doesn't help them.)



            They're not real creatures, so they don't benefit from spells like mage armor and barkskin that are designed to work on creatures.



            They aren't monks or barbarians so they don't get Unarmored Defense.



            Making them invisible / turning off the lights will make them entirely impossible to hit, since they're just visual illusions, but that's not a change in AC.






            share|improve this answer



















            • 2




              Your point about turning off the lights raises a question about mirror image working in the dark. They don't make any sound so are unlikely to be an actual distraction when you can't see them!
              – SeriousBri
              Nov 20 at 7:37






            • 4




              The spell actually mentions that creatures that can't see are unaffected by the spell, so turning off the lights won't help.
              – Erik
              Nov 20 at 11:07






            • 2




              @Erik: Well, from a technical point of view, the fact that enemies are not being affected by the spell reduces the mirror image's chance to be hit even more drastically...
              – mlk
              Nov 20 at 14:31















            up vote
            14
            down vote













            Hide behind something.



            Partial cover provides a direct bonus of +2 to +5 AC. The illusions follow wherever you go, so they'll follow you behind cover.



            Other than that, not really.



            They're not solid, so they can't wear armor. (If the caster wears armor, they will have illusory armor, but it doesn't help them.)



            They're not real creatures, so they don't benefit from spells like mage armor and barkskin that are designed to work on creatures.



            They aren't monks or barbarians so they don't get Unarmored Defense.



            Making them invisible / turning off the lights will make them entirely impossible to hit, since they're just visual illusions, but that's not a change in AC.






            share|improve this answer



















            • 2




              Your point about turning off the lights raises a question about mirror image working in the dark. They don't make any sound so are unlikely to be an actual distraction when you can't see them!
              – SeriousBri
              Nov 20 at 7:37






            • 4




              The spell actually mentions that creatures that can't see are unaffected by the spell, so turning off the lights won't help.
              – Erik
              Nov 20 at 11:07






            • 2




              @Erik: Well, from a technical point of view, the fact that enemies are not being affected by the spell reduces the mirror image's chance to be hit even more drastically...
              – mlk
              Nov 20 at 14:31













            up vote
            14
            down vote










            up vote
            14
            down vote









            Hide behind something.



            Partial cover provides a direct bonus of +2 to +5 AC. The illusions follow wherever you go, so they'll follow you behind cover.



            Other than that, not really.



            They're not solid, so they can't wear armor. (If the caster wears armor, they will have illusory armor, but it doesn't help them.)



            They're not real creatures, so they don't benefit from spells like mage armor and barkskin that are designed to work on creatures.



            They aren't monks or barbarians so they don't get Unarmored Defense.



            Making them invisible / turning off the lights will make them entirely impossible to hit, since they're just visual illusions, but that's not a change in AC.






            share|improve this answer














            Hide behind something.



            Partial cover provides a direct bonus of +2 to +5 AC. The illusions follow wherever you go, so they'll follow you behind cover.



            Other than that, not really.



            They're not solid, so they can't wear armor. (If the caster wears armor, they will have illusory armor, but it doesn't help them.)



            They're not real creatures, so they don't benefit from spells like mage armor and barkskin that are designed to work on creatures.



            They aren't monks or barbarians so they don't get Unarmored Defense.



            Making them invisible / turning off the lights will make them entirely impossible to hit, since they're just visual illusions, but that's not a change in AC.







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited Nov 21 at 15:05

























            answered Nov 19 at 23:49









            Mark Wells

            4,8051333




            4,8051333








            • 2




              Your point about turning off the lights raises a question about mirror image working in the dark. They don't make any sound so are unlikely to be an actual distraction when you can't see them!
              – SeriousBri
              Nov 20 at 7:37






            • 4




              The spell actually mentions that creatures that can't see are unaffected by the spell, so turning off the lights won't help.
              – Erik
              Nov 20 at 11:07






            • 2




              @Erik: Well, from a technical point of view, the fact that enemies are not being affected by the spell reduces the mirror image's chance to be hit even more drastically...
              – mlk
              Nov 20 at 14:31














            • 2




              Your point about turning off the lights raises a question about mirror image working in the dark. They don't make any sound so are unlikely to be an actual distraction when you can't see them!
              – SeriousBri
              Nov 20 at 7:37






            • 4




              The spell actually mentions that creatures that can't see are unaffected by the spell, so turning off the lights won't help.
              – Erik
              Nov 20 at 11:07






            • 2




              @Erik: Well, from a technical point of view, the fact that enemies are not being affected by the spell reduces the mirror image's chance to be hit even more drastically...
              – mlk
              Nov 20 at 14:31








            2




            2




            Your point about turning off the lights raises a question about mirror image working in the dark. They don't make any sound so are unlikely to be an actual distraction when you can't see them!
            – SeriousBri
            Nov 20 at 7:37




            Your point about turning off the lights raises a question about mirror image working in the dark. They don't make any sound so are unlikely to be an actual distraction when you can't see them!
            – SeriousBri
            Nov 20 at 7:37




            4




            4




            The spell actually mentions that creatures that can't see are unaffected by the spell, so turning off the lights won't help.
            – Erik
            Nov 20 at 11:07




            The spell actually mentions that creatures that can't see are unaffected by the spell, so turning off the lights won't help.
            – Erik
            Nov 20 at 11:07




            2




            2




            @Erik: Well, from a technical point of view, the fact that enemies are not being affected by the spell reduces the mirror image's chance to be hit even more drastically...
            – mlk
            Nov 20 at 14:31




            @Erik: Well, from a technical point of view, the fact that enemies are not being affected by the spell reduces the mirror image's chance to be hit even more drastically...
            – mlk
            Nov 20 at 14:31


















            draft saved

            draft discarded




















































            Thanks for contributing an answer to Role-playing Games Stack Exchange!


            • Please be sure to answer the question. Provide details and share your research!

            But avoid



            • Asking for help, clarification, or responding to other answers.

            • Making statements based on opinion; back them up with references or personal experience.


            Use MathJax to format equations. MathJax reference.


            To learn more, see our tips on writing great answers.





            Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


            Please pay close attention to the following guidance:


            • Please be sure to answer the question. Provide details and share your research!

            But avoid



            • Asking for help, clarification, or responding to other answers.

            • Making statements based on opinion; back them up with references or personal experience.


            To learn more, see our tips on writing great answers.




            draft saved


            draft discarded














            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2frpg.stackexchange.com%2fquestions%2f135926%2fis-it-possible-to-increase-the-ac-of-a-mirror-image-duplicate%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown





















































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown

































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown







            Popular posts from this blog

            Plaza Victoria

            In PowerPoint, is there a keyboard shortcut for bulleted / numbered list?

            How to put 3 figures in Latex with 2 figures side by side and 1 below these side by side images but in...