diff --git a/layout.sty b/layout.sty
index 37048c5ba368782168e387d5a9acbcf764f7f8ca..1243a2d6530e76d18cba68ade4fd06782c504f7c 100644
--- a/layout.sty
+++ b/layout.sty
@@ -324,10 +324,19 @@ bookmarks=true]%
 
 %%% \tn shows a tie number.
 
-\newcommand\tn[1]{%
+\newcounter{tn}
+\setcounter{tn}{7}
+\newcommand\tn[1][\arabic{tn}]{%
   \gls{tn}~#1%
 }
 
+\newcommand\roll[2]{%
+  \setcounter{tn}{7}%
+  \addtocounter{tn}{\value{#1}}%
+  \addtocounter{tn}{\value{#2}}%
+  #1 + #2%
+}
+
 %%% The dice-face (\dicef) command shows an actual die, or multiple
 %%% dice, equal to a number.  The optional argument lets it show
 %%% as \large or similar.
diff --git a/stats.sty b/stats.sty
index 4e01db252f7ff3fa32332d892a4a4649c4298796..b4c3c2342991534cdeabfea64f800c48df1425f8 100644
--- a/stats.sty
+++ b/stats.sty
@@ -854,7 +854,7 @@
   Viscid (on a tie, the attacker \emph{must} inflict Damage, but the weapon sticks into the body,
   \setcounter{track}{\value{str}}%
   \addtocounter{track}{7}%
-  \tn{\arabic{track}} to pull out)%
+  \tn[\arabic{track}] to pull out)%
 }
 
 \newcommand{\amphibious}{