diff --git a/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Dullness.java b/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Dullness.java
index 04fcb04f..ddc0aa7b 100644
--- a/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Dullness.java
+++ b/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Dullness.java
@@ -25,7 +25,6 @@ public final class Dullness extends EcoEnchant {
                 return;
         }
 
-
         if(!EnchantmentUtils.passedChance(this, level))
             return;
 
diff --git a/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Frozen.java b/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Frozen.java
index bce94bb9..ee01f8d7 100644
--- a/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Frozen.java
+++ b/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Frozen.java
@@ -32,7 +32,7 @@ public final class Frozen extends EcoEnchant {
         Player player = (Player) event.getEntity();
         LivingEntity victim = (LivingEntity) event.getDamager();
 
-        final int points = EnchantChecks.getArmorPoints(player, this, 1);
+        final int points = EnchantChecks.getArmorPoints(player, this, 0);
 
         if (points == 0)
             return;
diff --git a/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Launch.java b/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Launch.java
index ecfa8159..6c0eaca4 100644
--- a/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Launch.java
+++ b/Plugin/src/main/java/com/willfp/ecoenchants/enchantments/ecoenchants/normal/Launch.java
@@ -39,6 +39,6 @@ public final class Launch extends EcoEnchant {
         double multiplier = this.getConfig().getDouble(EcoEnchants.CONFIG_LOCATION + "multiplier");
         double boost = 1 + (multiplier * level);
 
-        Bukkit.getScheduler().runTaskLater(EcoEnchantsPlugin.getInstance(), () -> player.setVelocity(player.getVelocity().multiply(boost)), 1);
+        Bukkit.getScheduler().runTask(EcoEnchantsPlugin.getInstance(), () -> player.setVelocity(player.getVelocity().multiply(boost)));
     }
 }
diff --git a/Plugin/src/main/java/com/willfp/ecoenchants/integrations/antigrief/plugins/AntigriefGriefPrevention.java b/Plugin/src/main/java/com/willfp/ecoenchants/integrations/antigrief/plugins/AntigriefGriefPrevention.java
index f3c150fc..2e380b69 100644
--- a/Plugin/src/main/java/com/willfp/ecoenchants/integrations/antigrief/plugins/AntigriefGriefPrevention.java
+++ b/Plugin/src/main/java/com/willfp/ecoenchants/integrations/antigrief/plugins/AntigriefGriefPrevention.java
@@ -42,7 +42,7 @@ public final class AntigriefGriefPrevention implements AntigriefWrapper {
         if(victim instanceof Player) {
             return claim == null;
         } else {
-            if (claim != null) {
+            if (claim != null && claim.ownerID != null) {
                 return claim.ownerID.equals(player.getUniqueId());
             }
             return true;
diff --git a/Plugin/src/main/java/com/willfp/ecoenchants/integrations/anvilgui/plugins/AnvilGUIImpl.java b/Plugin/src/main/java/com/willfp/ecoenchants/integrations/anvilgui/plugins/AnvilGUIImpl.java
index cfbea64d..fd8b31d0 100644
--- a/Plugin/src/main/java/com/willfp/ecoenchants/integrations/anvilgui/plugins/AnvilGUIImpl.java
+++ b/Plugin/src/main/java/com/willfp/ecoenchants/integrations/anvilgui/plugins/AnvilGUIImpl.java
@@ -4,24 +4,16 @@ import com.willfp.ecoenchants.EcoEnchantsPlugin;
 import com.willfp.ecoenchants.integrations.anvilgui.AnvilGUIIntegration;
 
 public class AnvilGUIImpl implements AnvilGUIIntegration {
-    private static Class<?> ANVIL_GUI_CLASS = null;
+    private static final String ANVIL_GUI_CLASS = "net.wesjd.anvilgui.version.Wrapper" + EcoEnchantsPlugin.NMS_VERSION.substring(1) + "$AnvilContainer";
 
     @Override
     public boolean isInstance(Object object) {
         assert ANVIL_GUI_CLASS != null;
-        return object.getClass().equals(ANVIL_GUI_CLASS);
+        return object.getClass().toString().equals(ANVIL_GUI_CLASS);
     }
 
     @Override
     public String getPluginName() {
         return "AnvilGUI";
     }
-
-    static {
-        try {
-            ANVIL_GUI_CLASS = Class.forName("net.wesjd.anvilgui.version.Wrapper" + EcoEnchantsPlugin.NMS_VERSION.substring(1) + "$AnvilContainer");
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-    }
 }
diff --git a/Plugin/src/main/resources/enchants/normal/flinch.yml b/Plugin/src/main/resources/enchants/normal/flinch.yml
index 19a76c32..16feb5d3 100644
--- a/Plugin/src/main/resources/enchants/normal/flinch.yml
+++ b/Plugin/src/main/resources/enchants/normal/flinch.yml
@@ -21,4 +21,4 @@ general-config:
 
 config:
   chance-per-level: 2.5
-  ticks-per-level: 5
\ No newline at end of file
+  ticks-per-level: 10
\ No newline at end of file