make casting rules

rules.tex

@@ -36,6 +36,10 @@
 
 \input{rules/projectiles.tex}
 
+\subsection*{Magic}
+
+\input{rules/spells.tex}
+
 \subsection*{End of Scene}
 
 \input{rules/scenes.tex}

rules/spells.tex

+\subsubsection*{Spells}
+\begin{itemize}
+  \item
+  Casters can store a number of \glspl{mp} equal to the number of spheres they have times three.
+  \item
+  Casters can spend a number of \glspl{mp} equal to the highest sphere they are using to cast a spell.
+  \item
+  Casters without \glspl{mp} lose \glspl{fatigue} instead.
+  \item
+  A failed spell rips double the normal \glspl{mp} from the caster.
+\end{itemize}