diff --git a/knacks.tex b/knacks.tex
index 09be11b851312d9d39cdcfd5f47d4535de810961..84e77364eb72afe776dd4761f99746f070a0bce5 100644
--- a/knacks.tex
+++ b/knacks.tex
@@ -130,7 +130,10 @@ They gain +1 to their Attack Bonus when using that weapon.
 \subsubsection{Snap Caster}
 
 The character is particularly adept at casting spells quickly, and therefore in Combat.
-Spellcasters with this knack spend 1 less \gls{ap} when casting \textit{Fast} spells.
+Spellcasters using this Knack use Wits, rather than Charisma, as the Attribute to roll with spells.
+All spells cast this way cost 1 \gls{ap} less.
+
+A lot of spellcasters rely solely on this type of magic to cast spells, focussing on their insight into the world's hidden powers, rather than trying to sweet-talk the elements.
 
 \subsubsection{Vengeful}