The rules, in this case are pretty clear. The spell never mentions mirrors or reflections, it “summons illusory duplicates." Spell names aren’t indicative of their mechanical effect. See Chill Touch.

There’s also vampire wizard statblock that has Mirror Image on its spell list.

It would be funny if the spell just failed though.

    • reinei@lemmy.world
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      9 months ago

      Now I want to know wether the rules allow you to stand perfectly inside your mirror image (don’t have a 5th ed./any other D&D ed. rulebook to check myself, sorry)… Because if it does (without going all wavy or otherwise distorting) and it casts a reflection this could be a fun “find the hidden vampire in this banquet hall with mirrors” scenario!

      • Ahdok@ttrpg.networkOP
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        9 months ago

        I think the illusory duplicates made by the magic are designed to “move around in your space” to make it hard to tell which one is actually you - the purpose of the spell is to make you harder to hit, so it’s behaviour probably works to let that happen. It’d also be very difficult to get away with it in a social setting because you have to cast the spell first, it makes four duplicates, and they don’t last that long…


        Now on the other hand… Trickery Cleric “invoke duplicity” allows you to control the movements of the duplicate (which is incorporeal), so it might be possible to hide it inside you if you were really practiced. Konsi sometimes summons it in her exact position while standing still, then uses her second channel divinity slot to turn invisible and run away.

        It’ll only give you cover for a moment, but if they’re doing some sort of “check every visitor for vampirism” check on the door, it might get you past.

    • Ahdok@ttrpg.networkOP
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      9 months ago

      She likes to pull her hair back out of her face, and wrap it around a bone to hold it firm - but some of the front tufts always escape.

    • Archpawn@lemmy.world
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      9 months ago

      That’s based on the idea that vampires are weak to silver, right? In D&D, they don’t seem to have that weakness. It should be werewolves, devils, wights, jackalweres, wraiths and night hags that don’t have reflections in silver mirrors. Also, the mirror in equipment is steel. The only way to get a silver mirror is to learn Sanctuary and have a component pouch.

      • Setarkus.LW@lemmy.world
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        7 months ago

        I’ve read something along the lines of it being because silver is a “noble metal” (or something like that) and vampires are unholy/foul creatures, somehow making them not be reflected by silver mirrors