diff --git a/Java-Knight/src/main/java/org/project/combat/AttackResult.java b/Java-Knight/src/main/java/org/project/combat/AttackResult.java
new file mode 100644
index 0000000..df09aa7
--- /dev/null
+++ b/Java-Knight/src/main/java/org/project/combat/AttackResult.java
@@ -0,0 +1,18 @@
+package org.project.combat;
+
+public class AttackResult {
+
+    private int damageToTarget;
+    private int healSelf;
+    private boolean defended;
+
+    public AttackResult(int damageToTarget, int healSelf, boolean defended) {
+        this.damageToTarget = damageToTarget;
+        this.healSelf = healSelf;
+        this.defended = defended;
+    }
+
+    public int getDamageToTarget() { return damageToTarget; }
+    public int getHealSelf() { return healSelf; }
+    public boolean isDefended() { return defended; }
+}
diff --git a/Java-Knight/src/main/java/org/project/combat/TotalAttackCalculator.java b/Java-Knight/src/main/java/org/project/combat/TotalAttackCalculator.java
new file mode 100644
index 0000000..72cb6a3
--- /dev/null
+++ b/Java-Knight/src/main/java/org/project/combat/TotalAttackCalculator.java
@@ -0,0 +1,198 @@
+package org.project.combat;
+
+import org.project.abilities.SpecialAbility;
+import org.project.entity.Entity;
+import org.project.entity.players.Player;
+import org.project.item.armors.Armor;
+import org.project.item.weapons.Weapon;
+import org.project.managers.ActionDecisionManager;
+import org.project.managers.ManaCostManager;
+import org.project.managers.SpecialAbilityManager;
+import org.project.managers.StatusEffectManager;
+
+public class TotalAttackCalculator {
+
+    private final StatusEffectManager statusEffectManager;
+    private final SpecialAbilityManager specialAbilityManager;
+    private final ManaCostManager manaCostManager;
+
+    private static final int HEAL_AMOUNT = 25;
+    private static final int SHIELD_BASH_BASE_DAMAGE = 15;
+    private static final int SHIELD_BASH_STUN_CHANCE = 30;
+
+    public TotalAttackCalculator(
+            StatusEffectManager statusEffectManager,
+            SpecialAbilityManager specialAbilityManager,
+            ManaCostManager manaCostManager
+    ) {
+        this.statusEffectManager = statusEffectManager;
+        this.specialAbilityManager = specialAbilityManager;
+        this.manaCostManager = manaCostManager;
+    }
+
+    public AttackResult calculate(
+            Entity attacker,
+            Entity defender,
+            ActionDecisionManager.actionsType action
+    ) {
+
+        switch (action) {
+
+            case lightAttack:
+                return lightAttack(attacker, defender);
+
+            case heavyAttack:
+                return heavyAttack(attacker, defender);
+
+            case defend:
+                return defend(attacker);
+
+            case heal:
+                return heal(attacker);
+
+            case ability:
+                return ability(attacker, defender);
+
+            case shiedbash:
+                return shieldBash(attacker, defender);
+        }
+
+        return new AttackResult(0,0,false);
+    }
+
+    // --------------------------------
+    // LIGHT ATTACK
+    // --------------------------------
+    private AttackResult lightAttack(Entity attacker, Entity defender) {
+
+        int damage = attacker.getBaseDamage();
+
+        Weapon weapon = attacker.getWeapon();
+
+        if (weapon != null) {
+            damage += weapon.getLightAttackDamage();
+
+            if (weapon.getEffect() != null)
+                statusEffectManager.addEffect(weapon.getEffect(), defender);
+        }
+
+        damage = applyArmor(defender, damage);
+
+        if (defender.isDefending())
+            damage /= 2;
+
+        return new AttackResult(damage,0,false);
+    }
+
+    // --------------------------------
+    // HEAVY ATTACK
+    // --------------------------------
+    private AttackResult heavyAttack(Entity attacker, Entity defender) {
+
+        if (!manaCostManager.useHeavyAttack( attacker))
+            return new AttackResult(0,0,false);
+
+        int damage = attacker.getBaseDamage() * 2;
+
+        Weapon weapon = attacker.getWeapon();
+
+        if (weapon != null) {
+
+            damage += weapon.getHeavyAttackDamage();
+
+            if (weapon.getEffect() != null)
+                statusEffectManager.addEffect(weapon.getEffect(), defender);
+        }
+
+        damage = applyArmor(defender, damage);
+
+        if (defender.isDefending())
+            damage /= 2;
+
+        return new AttackResult(damage,0,false);
+    }
+
+    // --------------------------------
+    // DEFEND
+    // --------------------------------
+    private AttackResult defend(Entity attacker) {
+
+        if (!manaCostManager.useHeavyAttack( attacker))
+            return new AttackResult(0,0,false);
+
+        return new AttackResult(0,0,true);
+    }
+
+    // --------------------------------
+    // HEAL
+    // --------------------------------
+    private AttackResult heal(Entity attacker) {
+
+        if (!manaCostManager.useHeavyAttack( attacker))
+            return new AttackResult(0,0,false);
+
+        return new AttackResult(0,HEAL_AMOUNT,false);
+    }
+
+    // --------------------------------
+    // SPECIAL ABILITY
+    // --------------------------------
+    private AttackResult ability(Entity attacker, Entity defender) {
+
+        SpecialAbility ability = attacker.getSpacialAbility();
+
+        if (ability == null)
+            return new AttackResult(0,0,false);
+
+        if (attacker instanceof Player && !manaCostManager.useSpecialAbility((Player) attacker))
+            return new AttackResult(0,0,false);
+
+        Entity target =
+                ability.getTarget() == SpecialAbility.AbilityTarget.SELF
+                        ? attacker
+                        : defender;
+
+        specialAbilityManager.addAbility(ability, target);
+
+        return new AttackResult(0,0,false);
+    }
+
+    // --------------------------------
+    // SHIELD BASH
+    // --------------------------------
+    private AttackResult shieldBash(Entity attacker, Entity defender) {
+
+        if (!manaCostManager.useHeavyAttack( attacker))
+            return new AttackResult(0,0,false);
+
+        Armor armor = attacker.getArmor();
+
+        if (armor == null)
+            return new AttackResult(0,0,false);
+
+        if (armor.getType() != Armor.ArmorType.HEAVY)
+            return new AttackResult(0,0,false);
+
+        int damage = SHIELD_BASH_BASE_DAMAGE + armor.getDefense() / 2;
+
+        damage = applyArmor(defender, damage);
+
+        if (Math.random() * 100 < SHIELD_BASH_STUN_CHANCE)
+            defender.stun();
+
+        return new AttackResult(damage,0,false);
+    }
+
+    // --------------------------------
+    // ARMOR REDUCTION
+    // --------------------------------
+    private int applyArmor(Entity defender, int rawDamage) {
+
+        Armor armor = defender.getArmor();
+
+        if (armor == null)
+            return rawDamage;
+
+        return armor.reduceDamage(rawDamage);
+    }
+}