diff --git a/vnavmesh/Customizations/Z1242Yuweyawata.cs b/vnavmesh/Customizations/Z1242Yuweyawata.cs
new file mode 100644
index 0000000..b3205c9
--- /dev/null
+++ b/vnavmesh/Customizations/Z1242Yuweyawata.cs
@@ -0,0 +1,23 @@
+using FFXIVClientStructs.FFXIV.Common.Component.BGCollision.Math;
+using System.Numerics;
+
+namespace Navmesh.Customizations;
+
+[CustomizationTerritory(1242)]
+class Z1242Yuweyawata : NavmeshCustomization
+{
+    public override int Version => 1;
+
+    public override void CustomizeScene(SceneExtractor scene)
+    {
+        // avoid the hole in last boss arena
+        var scale = new Vector3(11, 1, 11);
+        var transform = Matrix4x3.Identity;
+        transform.M11 = scale.X;
+        transform.M22 = scale.Y;
+        transform.M33 = scale.Z;
+        transform.Row3 = new(34, -87.9f, -710);
+        var aabb = new AABB() { Min = transform.Row3 - scale, Max = transform.Row3 + scale };
+        scene.Meshes["<cylinder>"].Instances.Add(new(0xbaadf00d00000001ul, transform, aabb, SceneExtractor.PrimitiveFlags.ForceUnwalkable, default));
+    }
+}