[crossfire] "noalchemy" tile, to prevent repetitions of recent events

[Mark Wedel]

Andrew Fuchs wrote:
>
      As I write this, several characters on metalforge are performing
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      alchemy in places like, the Hall of Sellection, /start/Nexus, and in
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      the middle of scorn.
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     >
      Basicly, I think we could really use a tile, that prevents the use of alchemy.
     
  Probably simplest to just make it that if the space is no magic, can't do alchemy.