diff --git a/LightlessSyncServer/LightlessSyncServices/Discord/MareWizardModule.Vanity.cs b/LightlessSyncServer/LightlessSyncServices/Discord/MareWizardModule.Vanity.cs
index c926bc4..917dafc 100644
--- a/LightlessSyncServer/LightlessSyncServices/Discord/MareWizardModule.Vanity.cs
+++ b/LightlessSyncServer/LightlessSyncServices/Discord/MareWizardModule.Vanity.cs
@@ -92,13 +92,22 @@ public partial class LightlessWizardModule
         var desiredVanityUid = modal.DesiredVanityUID;
         using var db = await GetDbContext().ConfigureAwait(false);
         bool canAddVanityId = !db.Users.Any(u => u.UID == modal.DesiredVanityUID || u.Alias == modal.DesiredVanityUID);
+        var forbiddenWords = new[] { "null", "nil" };
 
-        Regex rgx = new(@"^[_\-a-zA-Z0-9]{5,15}$", RegexOptions.ECMAScript);
+        Regex rgx = new(@"^[_\-a-zA-Z0-9]{3,15}$", RegexOptions.ECMAScript);
         if (!rgx.Match(desiredVanityUid).Success)
         {
             eb.WithColor(Color.Red);
             eb.WithTitle("Invalid Vanity UID");
-            eb.WithDescription("A Vanity UID must be between 5 and 15 characters long and only contain the letters A-Z, numbers 0-9, dashes (-) and underscores (_).");
+            eb.WithDescription("A Vanity UID must be between 3 and 15 characters long and only contain the letters A-Z, numbers 0-9, dashes (-) and underscores (_).");
+            cb.WithButton("Cancel", "wizard-vanity", ButtonStyle.Secondary, emote: new Emoji("❌"));
+            cb.WithButton("Pick Different UID", "wizard-vanity-uid-set:" + uid, ButtonStyle.Primary, new Emoji("💅"));
+        }
+        else if (forbiddenWords.Contains(desiredVanityUid.Trim().ToLowerInvariant()))
+        {
+            eb.WithColor(Color.Red);
+            eb.WithTitle("Invalid Vanity UID");
+            eb.WithDescription("You cannot use 'Null' or 'Nil' (any case) as a Vanity UID. Please pick a different one.");
             cb.WithButton("Cancel", "wizard-vanity", ButtonStyle.Secondary, emote: new Emoji("❌"));
             cb.WithButton("Pick Different UID", "wizard-vanity-uid-set:" + uid, ButtonStyle.Primary, new Emoji("💅"));
         }