The Enemy subclasses completed.

Java-Knight/src/main/java/org/project/entity/enemies/Enemy.java

@@ -22,6 +22,8 @@ public abstract class Enemy implements Entity {
         this.weapon = weapon;
     }
 
+    public abstract void attack(Entity target);
+
     @Override
     public void takeDamage(int damage) {
         hp -= damage;

Java-Knight/src/main/java/org/project/entity/enemies/Goblin.java

@@ -1,11 +1,39 @@
 package org.project.entity.enemies;
 
+import org.project.entity.Entity;
 import org.project.item.weapons.BoneDagger;
 import org.project.item.weapons.ToothedHook;
 
+import java.util.Random;
+
 public class Goblin extends Enemy {
+    private Random random;
+
     public Goblin() {
-        super("Goblin", 30, 30, new ToothedHook());
+        super("Goblin", 30, 20, new ToothedHook());
+    }
+
+    @Override
+    public void attack(Entity target) {
+        int damage = 10;
+        boolean isCritical = false;
+
+        //Checking Critical Chance
+        int chance = random.nextInt(100);
+        if (chance > 30) {          //Critical Chance = 70%
+            damage *= 2;
+            isCritical = true;
+        }
+
+        target.takeDamage(damage);
+
+        if (isCritical) {
+            System.out.println("💣 Goblin used CRITICAL STRIKE! ");
+            System.out.println("💥 Goblin dealt " + damage + " damage to " + getName(target) + "!");
+        } else {
+            System.out.println("👹 Goblin attacked " + getName(target) + "!");
+            System.out.println("💥 Goblin dealt " + damage + " damage to " + getName(target) + "!");
+        }
     }
 
     @Override
@@ -15,6 +43,6 @@ public class Goblin extends Enemy {
 
     @Override
     public int getMaxMP() {
-        return 30;
+        return 20;
     }
 }

Java-Knight/src/main/java/org/project/entity/enemies/Skeleton.java

@@ -1,5 +1,6 @@
 package org.project.entity.enemies;
 
+import org.project.entity.Entity;
 import org.project.item.weapons.BoneDagger;
 
 public class Skeleton extends Enemy {
@@ -9,6 +10,17 @@ public class Skeleton extends Enemy {
         super("Skeleton", 40, 25, new BoneDagger());
     }
 
+    @Override
+    public void attack(Entity target) {
+        int damage = 10;
+
+        target.takeDamage(damage);
+
+        System.out.println("💀 Skeleton attacked " + getName(target) + "!");
+        System.out.println("💥 Skeleton dealt " + damage + " damage to "
+                + getName(target) + "!");
+    }
+
     @Override
     public void takeDamage(int damage) {
         int newHp = getHp() - damage;
@@ -20,14 +32,16 @@ public class Skeleton extends Enemy {
             hasResurrected = true;
 
             System.out.println("💀 Skeleton has been defeated...");
-            System.out.println("☠️ But Skeleton rises again! Resurrected with " + resurrectedHp + " HP!");
+            System.out.println("☠️ But Skeleton rises again! Resurrected with "
+                    + resurrectedHp + " HP!");
             return;
         }
 
         setHp(newHp);
         if (getHp() < 0) setHp(0);
 
-        System.out.println("💥 Skeleton took " + damage + " damage! HP: " + getHp() + "/" + getMaxHP());
+        System.out.println("💥 Skeleton took " + damage + " damage! HP: "
+                + getHp() + "/" + getMaxHP());
 
         if (getHp() <= 0) {
             System.out.println("☠️ Skeleton has been destroyed for good!");

Java-Knight/src/main/java/org/project/entity/enemies/Vampire.java

@@ -1,4 +1,44 @@
 package org.project.entity.enemies;
 
-public class Vampire {
+import org.project.entity.Entity;
+import org.project.item.weapons.ToothedHook;
+
+public class Vampire extends Enemy {
+    public Vampire() {
+        super("Vampire", 50, 40, new ToothedHook());
+    }
+
+    @Override
+    public void attack(Entity target) {
+        int damage = 12;
+
+        target.takeDamage(damage);
+
+        //Adding to Vampire HP
+        int healAmount = damage * 30 / 100;
+        int newHp = getHp() + healAmount;
+        if (newHp > getMaxHP()) {
+            newHp = getMaxHP();
+        }
+        setHp(newHp);
+
+        System.out.println("🦇 Vampire attacks " + getName(target) + "!");
+        System.out.println("💥 Dealt " + damage + " damage!");
+        System.out.println("🩸 Life steal: Vampire drains " + healAmount + " HP and regenerates!");
+        System.out.println("💚 Vampire HP: " + getHp() + "/" + getMaxHP());
+
+        if (getHp() == getMaxHP()) {
+            System.out.println("🦇 Vampire is fully satiated!");
+        }
+    }
+
+    @Override
+    public int getMaxHP() {
+        return 50;
+    }
+
+    @Override
+    public int getMaxMP() {
+        return 40;
+    }
 }

Java-Knight/src/main/java/org/project/item/weapons/Rapier.java

@@ -4,9 +4,7 @@ import org.project.item.Item;
 
 //The vampire's weapon
 public class Rapier extends Weapon implements Item {
-    int abilityCharge;
-
-    public Rapier(int damage, int manaCost) {
-        super(damage, manaCost);
+    public Rapier() {
+        super(20, 10);
     }
 }