add ties to magic

magic.tex

@@ -73,7 +73,14 @@ If a sphere has not been `fully' paid for, then the remaining \glspl{xp} must be
 \subsection{Casting}
 
 Spells are cast by spending a number of \gls{mp} equal to the spell's level, so 1st level spells always cost 1 \gls{mp} and 3rd level spells always cost 3 \gls{mp}.
-The character then spends the mana and makes a roll against some \gls{tn} to cast the spell.
+The character then spends the mana and makes a roll against \gls{tn} 6 + the spell's Level.
+
+\subsection{Spell Ties \& Failures}
+
+Spells which fail to cast drain the caster of double the usual \glspl{mp}, so failure to cast a third-level spell drains the caster of 6 \glspl{mp}.
+Once this minimum \gls{tn} has been reached, the caster can `fail' to create the desired effect; fireballs can miss, illusions might look like bad CGI, but the spell will not `backfire' in any way because of these problems.
+
+Spells which reach the \gls{tn} precisely give the caster a choice -- either abandon the spell (at no cost), or spend double the normal \glspl{mp} to have it succeed.
 
 \index{Mana}\subsection{Mana}
 
@@ -190,7 +197,7 @@ They can each invest \gls{mp} to create \gls{standingspell}, and thereafter any
 \subsection{Spell Enhancements}
 \label{Enhancements}
 
-Spell Enhancements make spells stronger, at the expense of adding to the spell's level, and \gls{tn}.
+Spell Enhancements make spells stronger, at the expense of adding to the spell's level.
 These Enhancements always take the form of adjectives.
 
 \iftoggle{verbose}{
@@ -202,10 +209,6 @@ These Enhancements always take the form of adjectives.
 
   \Glspl{miracleworker} gain access to Enhancements by raising their Metamagic level (which is always equal to their maximum \glspl{mp}).
 
-  \subsection{Spell Failure}
-  Spells are always cast, even if the caster does not get the intended result.
-  If an illusion spell fails, the illusion persists -- it simply looks obviously magical, like bad CGI.
-  If a fireball spell fails, fire still comes, as the mage's mana has to go \emph{somewhere}, even if nothing hits the intended target.
 }{
   Casters gain Enhancements through gaining Metamagic levels.
 }