rephrase talisman gls entry

glossary.tex

@@ -89,14 +89,14 @@
 }
 
 \newglossaryentry{talisman}{
-  nonumberlist,
   prefix={a\space},
-  name={A Talisman},
+  name={Talismans},
   text={talisman},
   first={talisman (a one-use magical item)},
   firstplural={talismans (one-use magical items)},
   sort={Talisman},
-  description={store spells, and activate once the right condition is met},
+  description={usually store two spells -- one to detect a target, and another to cast upon them.
+  Each talisman has its own activation condition},
 }
 
 \newglossaryentry{area}{