diff --git a/glossary.tex b/glossary.tex
index bb42ac0918456b7fcdaeeb1ab19bb64ea0ceb6ef..5f6b9ef770b9d1542736880c21d174b682e19a38 100644
--- a/glossary.tex
+++ b/glossary.tex
@@ -1053,7 +1053,9 @@ Set the darker die to `\dicef{6}' and roll the other.  If this roll fails, it fa
   When `overspending' on the \glsentrytext{invocation}, the debt is paid in \glsentrytext{ep}.
 
   \Glsfmtplural{tn} depend on how malleable the target is.
-  Earth spells can affect ice far more easily than rocks, and Air spells can whip up a gale easier when outdoors},
+  Earth spells can affect ice far more easily than rocks, and Air spells can whip up a gale easier when outdoors.
+
+  When used in combat, spells cost a number of \glsfmtplural{ap} equal to the \glsentrytext{mp}-cost + 1},
 }
 
 \longnewglossaryentry{alchemy}{