Реализованы классы Damager и Hitbox

Assets/Scripts/Gameplay/Core.meta

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Assets/Scripts/Gameplay/Core/Damager.cs

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+using UnityEngine;
+using UnityEngine.Events;
+
+[RequireComponent (typeof(Collider))]
+public class Damager : MonoBehaviour
+{
+    [SerializeField] private int Damage;
+    private GameObject Owner;
+
+    public UnityEvent OnCollision;
+
+    public void Initialize(GameObject Owner)
+    {
+        if (OnCollision == null) OnCollision = new();
+
+        this.Owner = Owner;
+    }
+
+
+    private void OnTriggerEnter(Collider other)
+    {
+        if(other.TryGetComponent<Hitbox>(out var hitbox))
+        {
+            //Коллизия с собой
+            if (hitbox.Owner == this.Owner) return;
+
+            hitbox.TakeDamage(Damage);
+        }
+
+        OnCollision?.Invoke();
+    }
+}

Assets/Scripts/Gameplay/Core/Damager.cs.meta

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Assets/Scripts/Gameplay/Core/Hitbox.cs

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+using System;
+using UnityEngine;
+
+[RequireComponent (typeof(Collider))]
+public class Hitbox : MonoBehaviour
+{
+    public GameObject Owner { get; private set; }
+    public event Action<int> OnDamage;
+    public void Initialize(GameObject Owner) => this.Owner = Owner;
+    public void TakeDamage(int damage) => OnDamage?.Invoke(damage);
+}

Assets/Scripts/Gameplay/Core/Hitbox.cs.meta

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