add elixir gls entry

glossary.tex

@@ -462,6 +462,15 @@
   Each has an elemental affinity, so a Fire Ingredient can only make a Fire \glsentrytext{boon}},
 }
 
+\newglossaryentry{elixir}{
+  name={Elixirs},
+  text={elixir},
+  prefix={an\space},
+  parent={alchemy},
+  description={heal diseases.
+  Each one requires a particular type of \glsentrytext{ingredient} to heal a particular disease},
+}
+
 \newglossaryentry{invocation}{
   name={Invocations},
   text={Invocation},