diff --git a/src/main/java/xyz/alexcrea/cuanvil/enchant/EnchantmentProperties.java b/src/main/java/xyz/alexcrea/cuanvil/enchant/EnchantmentProperties.java
new file mode 100644
index 0000000..cb481df
--- /dev/null
+++ b/src/main/java/xyz/alexcrea/cuanvil/enchant/EnchantmentProperties.java
@@ -0,0 +1,57 @@
+package xyz.alexcrea.cuanvil.enchant;
+
+// to bind EnchantmentRarity to an enchantment...
+public enum EnchantmentProperties {
+
+    AQUA_AFFINITY(EnchantmentRarity.RARE),
+    BANE_OF_ARTHROPODS(EnchantmentRarity.UNCOMMON),
+    BINDING_CURSE(EnchantmentRarity.VERY_RARE),
+    BLAST_PROTECTION(EnchantmentRarity.RARE),
+    CHANNELING(EnchantmentRarity.VERY_RARE),
+    DEPTH_STRIDER(EnchantmentRarity.RARE),
+    EFFICIENCY(EnchantmentRarity.COMMON),
+    FLAME(EnchantmentRarity.RARE),
+    FEATHER_FALLING(EnchantmentRarity.UNCOMMON),
+    FIRE_ASPECT(EnchantmentRarity.RARE),
+    FIRE_PROTECTION(EnchantmentRarity.UNCOMMON),
+    FORTUNE(EnchantmentRarity.RARE),
+    FROST_WALKER(EnchantmentRarity.RARE),
+    IMPALING(EnchantmentRarity.RARE),
+    INFINITY(EnchantmentRarity.VERY_RARE),
+    KNOCKBACK(EnchantmentRarity.UNCOMMON),
+    LOOTING(EnchantmentRarity.RARE),
+    LOYALTY(EnchantmentRarity.COMMON),
+    LUCK_OF_THE_SEA(EnchantmentRarity.RARE),
+    LURE(EnchantmentRarity.RARE),
+    MENDING(EnchantmentRarity.RARE),
+    MULTISHOT(EnchantmentRarity.RARE),
+    PIERCING(EnchantmentRarity.COMMON),
+    POWER(EnchantmentRarity.COMMON),
+    PROJECTILE_PROTECTION(EnchantmentRarity.UNCOMMON),
+    PROTECTION(EnchantmentRarity.COMMON),
+    PUNCH(EnchantmentRarity.RARE),
+    QUICK_CHARGE(EnchantmentRarity.UNCOMMON),
+    RESPIRATION(EnchantmentRarity.RARE),
+    RIPTIDE(EnchantmentRarity.RARE),
+    SILK_TOUCH(EnchantmentRarity.VERY_RARE),
+    SHARPNESS(EnchantmentRarity.COMMON),
+    SMITE(EnchantmentRarity.UNCOMMON),
+    SOUL_SPEED(EnchantmentRarity.VERY_RARE),
+    SWIFT_SNEAK(EnchantmentRarity.VERY_RARE),
+    SWEEPING(EnchantmentRarity.RARE),
+    THORNS(EnchantmentRarity.VERY_RARE),
+    UNBREAKING(EnchantmentRarity.UNCOMMON),
+    VANISHING_CURSE(EnchantmentRarity.VERY_RARE)
+
+    ;
+
+    private final EnchantmentRarity rarity;
+    EnchantmentProperties(EnchantmentRarity rarity){
+        this.rarity = rarity;
+    }
+
+    public EnchantmentRarity getRarity() {
+        return rarity;
+    }
+
+}
diff --git a/src/main/java/xyz/alexcrea/cuanvil/enchant/EnchantmentRarity.java b/src/main/java/xyz/alexcrea/cuanvil/enchant/EnchantmentRarity.java
new file mode 100644
index 0000000..e1ff834
--- /dev/null
+++ b/src/main/java/xyz/alexcrea/cuanvil/enchant/EnchantmentRarity.java
@@ -0,0 +1,33 @@
+package xyz.alexcrea.cuanvil.enchant;
+
+// because spigot (1.18) do not support enchantment rarity, I need to do it myself...
+public enum EnchantmentRarity {
+
+    NO_RARITY(0, 0),
+    COMMON(1),
+    UNCOMMON(2),
+    RARE(4),
+    VERY_RARE(8)
+
+    ;
+
+    private final int itemValue;
+    private final int bookValue;
+
+    EnchantmentRarity(int itemValue, int bookValue){
+        this.itemValue = itemValue;
+        this.bookValue = bookValue;
+    }
+    EnchantmentRarity(int itemValue){
+        this(itemValue, Math.max(1,itemValue/2));
+    }
+
+    public int getBookValue() {
+        return bookValue;
+    }
+
+    public int getItemValue() {
+        return itemValue;
+    }
+
+}
diff --git a/src/main/java/xyz/alexcrea/cuanvil/gui/config/EnchantCostConfigGui.java b/src/main/java/xyz/alexcrea/cuanvil/gui/config/EnchantCostConfigGui.java
index 9a0d58d..83980f7 100644
--- a/src/main/java/xyz/alexcrea/cuanvil/gui/config/EnchantCostConfigGui.java
+++ b/src/main/java/xyz/alexcrea/cuanvil/gui/config/EnchantCostConfigGui.java
@@ -6,6 +6,8 @@ import org.bukkit.enchantments.Enchantment;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
 import xyz.alexcrea.cuanvil.config.ConfigHolder;
+import xyz.alexcrea.cuanvil.enchant.EnchantmentProperties;
+import xyz.alexcrea.cuanvil.enchant.EnchantmentRarity;
 import xyz.alexcrea.cuanvil.gui.config.settings.EnchantCostSettingsGui;
 import xyz.alexcrea.cuanvil.gui.util.GuiGlobalItems;
 import xyz.alexcrea.cuanvil.util.StringUtil;
@@ -30,12 +32,18 @@ public class EnchantCostConfigGui extends AbstractEnchantConfigGui<EnchantCostSe
 
     @Override
     public EnchantCostSettingsGui.EnchantCostSettingFactory getFactoryFromEnchant(Enchantment enchant) {
-        String key = enchant.getKey().getKey().toLowerCase(Locale.ROOT);
+        String key = enchant.getKey().getKey().toLowerCase(Locale.ENGLISH);
         String prettyKey = StringUtil.snakeToUpperSpacedCase(key);
 
+        // try to find rarity. default to 0 if not found
+        EnchantmentRarity rarity = EnchantmentRarity.NO_RARITY;
+        try {
+            rarity = EnchantmentProperties.valueOf(key.toUpperCase(Locale.ENGLISH)).getRarity();
+        }catch (IllegalArgumentException ignored){}
+
         return EnchantCostSettingsGui.enchFactory(prettyKey+" Level Cost", this,
                 SECTION_NAME+'.'+key, ConfigHolder.DEFAULT_CONFIG, 0, 255,
-                enchant.getMaxLevel(),4,
+                rarity.getItemValue(), rarity.getBookValue(),
                 1, 10, 50);
     }