greg kaye
Explorer
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Now so far I have talked about tech, but let's be honest some magic is WAY beyond our tech. The really old version of trek had the red head doctor wave a light stick over wounds to close them. If that isn't a wand of cure wounds I don't know what is.
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Access to magic spells could be ubiquitous but the creation of magic items required levels of time and money that a peasantry might often directly lack. However, people in all groups may have been wary of magic, and the first level ritual, detect magic, could be widely used....
the ubiquity of magic amomgst DnD peasants is an anomoly that requires notions of Liberté, égalité, fraternité, mercantilism and industrial scale production to be a thing
There's a common situation when arriving at functions for weapons to be handed in and, as a parallel to this, it could be possible for a caster (or two in a sequenced pair) to be repeatedly casting detect magic at, say, the entrance to an event. Other security might also keep an eye out for lead boxes.
Authorities might also have agents cast detect magic before going on ten-minute walks around localities so as to see which people were in possession of magic and, presuming the detector has an awareness of the Nystul's Magic Aura spell, a particular interest might be paid to items emanating subtle signs of illusion magic.
(As a side note, the French, post-revolution focus on fraternité contradicts principles of liberté and égalité. This may seem particularly unjust considering the prominent role that women played in aspects of the revolution).