How can I attach a colldier that moves with the enemies sword in an attack animation?

This is the current code I have on all of my enemies, it checks to see if the character is within range, and then it plays the attack animation and removes health from the player. I want to have it set up so a coliider is on the sword of the enemy, that way it only reduces damage when you are actually hit by the sword, not just being close enough How would I implement this?

 void Update () {
     if (spartanPt < 0 && sAlive == true) {
     gameObject.transform.parent.gameObject.GetComponent<Animation>().Play("die");
     sAlive = false;
     Destroy(gameObject.transform.parent.gameObject.GetComponent<CapsuleCollider> ());
             
      } else if (sAlive == true) {        
     Vector3 heading = GameObject.FindGameObjectWithTag ("mazeDude").transform.position - transform.position;
     float distance = heading.magnitude;
     Vector3 direction = heading / distance;
 
     if (heading.sqrMagnitude < maxRange * maxRange) {
         gameObject.transform.parent.gameObject.GetComponent<Animation> ().Play ("attack");
         GameObject.FindGameObjectWithTag ("sword").GetComponent<Weapons> ().healthPt -= 3;
 
     }
 }