diff --git a/spells.rb b/spells.rb
index 1379964..3e2cd25 100644
--- a/spells.rb
+++ b/spells.rb
@@ -17,6 +17,16 @@ class Spell
 									]
 		)
 
+        spells << Spell.new(
+            :name                  => "Opacity",
+            :matter                => 3,
+            :practice              => "Weaving",
+            :primary_factor        => "Duration",
+            :suggested_rote_skills => ["Science", "Stealth", "Subterfuge"],
+            :authors               => ["NEETzsche"],
+            :rules_text            => "The willworker can make transparent or translucent materials completely opaque. Air becomes completely impossible to see through, windows become solid colors, and bodies of water become too murky to see their non-aquatic contents. If the scale of this spell is an area of effect, any people inside of it suffer the Blinded Tilt."
+        )
+
 		spells << Spell.new(
 			:name                  => "It Takes One To Know One",
 			:death                 => 1,