InvincibilityController.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class InvincibilityController : MonoBehaviour
{
   private HealthController healthController;

   private void Awake()
   {
       healthController = GetComponent<HealthController>();
   }

   public void StartInvincibility(float invincibilityDuration)
   {
    StartCoroutine(InvincibilityCoroutine (invincibilityDuration));




   }

   private IEnumerator InvincibilityCoroutine(float invincibilityDuration)
   {
      healthController.IsInvincible = true;

      yield return new WaitForSeconds(invincibilityDuration);

      healthController.IsInvincible = false;

   }
}