Clarify what a Nuzusul is in Nuzusul Monitor

spells.rb

@@ -1065,7 +1065,7 @@ class Spell
             :withstand             => "Composure",
             :suggested_rote_skills => ["Occult", "Empathy", "Survival"],
             :authors               => ["NEETzsche"],
-            :rules_text            => "The willworker applies the Vicarious Story Condition on a nuzusul. He watches their First Change."
+            :rules_text            => "The willworker applies the Vicarious Story Condition on a nuzusul, which is a Wolf-Blood who is soon to undergo their First Change. He watches their First Change."
         )
 
         spells << Spell.new(