diff --git a/src/main/java/net/Indyuce/mmocore/MMOCore.java b/src/main/java/net/Indyuce/mmocore/MMOCore.java
index 1fd869fb..5141e462 100644
--- a/src/main/java/net/Indyuce/mmocore/MMOCore.java
+++ b/src/main/java/net/Indyuce/mmocore/MMOCore.java
@@ -8,6 +8,7 @@ import io.lumine.mythic.utils.plugin.LuminePlugin;
 import net.Indyuce.mmocore.api.ConfigFile;
 import net.Indyuce.mmocore.api.PlayerActionBar;
 import net.Indyuce.mmocore.api.player.PlayerData;
+import net.Indyuce.mmocore.api.player.attribute.AttributeModifier;
 import net.Indyuce.mmocore.api.player.profess.resource.PlayerResource;
 import net.Indyuce.mmocore.api.player.stats.StatType;
 import net.Indyuce.mmocore.api.util.debug.DebugMode;
@@ -31,7 +32,6 @@ import net.Indyuce.mmocore.listener.event.PlayerPressKeyListener;
 import net.Indyuce.mmocore.listener.option.*;
 import net.Indyuce.mmocore.listener.profession.FishingListener;
 import net.Indyuce.mmocore.listener.profession.PlayerCollectStats;
-import net.Indyuce.mmocore.loot.chest.LootChest;
 import net.Indyuce.mmocore.manager.*;
 import net.Indyuce.mmocore.manager.data.DataProvider;
 import net.Indyuce.mmocore.manager.data.mysql.MySQLDataProvider;
@@ -55,7 +55,6 @@ import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.lang.reflect.Field;
-import java.util.Iterator;
 import java.util.logging.Level;
 
 public class MMOCore extends LuminePlugin {
@@ -116,8 +115,9 @@ public class MMOCore extends LuminePlugin {
 			return;
 		}
 
-		// Register MMOCore-specific target restrictions
+		// Register MMOCore-specific objects
 		MythicLib.plugin.getEntities().registerRestriction(new PartyMemberTargetRestriction());
+		MythicLib.plugin.getModifiers().registerModifierType("attribute", configObject -> new AttributeModifier(configObject));
 
 		// Register extra objective, drop items...
 		if (Bukkit.getPluginManager().getPlugin("WorldGuard") != null)
diff --git a/src/main/java/net/Indyuce/mmocore/api/player/attribute/AttributeModifier.java b/src/main/java/net/Indyuce/mmocore/api/player/attribute/AttributeModifier.java
index 108d3ebb..7dd53051 100644
--- a/src/main/java/net/Indyuce/mmocore/api/player/attribute/AttributeModifier.java
+++ b/src/main/java/net/Indyuce/mmocore/api/player/attribute/AttributeModifier.java
@@ -12,6 +12,7 @@ import net.Indyuce.mmocore.api.player.PlayerData;
 import org.apache.commons.lang.Validate;
 
 import java.text.DecimalFormat;
+import java.util.Objects;
 
 public class AttributeModifier extends PlayerModifier {
     private final String attribute;
@@ -74,9 +75,10 @@ public class AttributeModifier extends PlayerModifier {
     public AttributeModifier(ConfigObject object) {
         super(object.getString("key"), EquipmentSlot.OTHER, ModifierSource.OTHER);
 
+        String str = Objects.requireNonNull(object.getString("value"));
+        type = str.toCharArray()[str.length() - 1] == '%' ? ModifierType.RELATIVE : ModifierType.FLAT;
+        value = Double.parseDouble(type == ModifierType.RELATIVE ? str.substring(0, str.length() - 1) : str);
         this.attribute = object.getString("attribute");
-        this.value = object.getDouble("value");
-        type = object.getBoolean("multiplicative", false) ? ModifierType.RELATIVE : ModifierType.FLAT;
     }
 
     public String getAttribute() {
diff --git a/src/main/java/net/Indyuce/mmocore/experience/ExperienceObject.java b/src/main/java/net/Indyuce/mmocore/experience/ExperienceObject.java
index 445e81c8..c14f0232 100644
--- a/src/main/java/net/Indyuce/mmocore/experience/ExperienceObject.java
+++ b/src/main/java/net/Indyuce/mmocore/experience/ExperienceObject.java
@@ -7,11 +7,10 @@ import org.jetbrains.annotations.NotNull;
 import javax.annotation.Nullable;
 
 /**
- * General implementation for professions and classes.
+ * General implementation for professions, classes and attributes.
  * <p>
- * An experience object is a type of object that can
- * level up. It has an experience curve and table and
- * can receive EXP
+ * An experience object is a type of object that can level up.
+ * It has an experience curve and table and can receive EXP
  *
  * @author jules
  */