add artefact gls entry

glossary.tex

@@ -99,6 +99,14 @@
   Each talisman has its own activation condition},
 }
 
+\newglossaryentry{artefact}{
+  prefix={an\space},
+  name={Artifacts},
+  text={artefact},
+  description={are spells given sentience, and function as long-term magical items.
+  They frequently go awry, as they have a mind of their own, and their own wishes and values},
+}
+
 \newglossaryentry{area}{
   name={Areas},
   sort={Area},