IEnumerator ActivateDeathSphere()
    {
        while (!hasExploded)
        {
            hasExploded = true;
            foreach (GameObject card in cards)
            {
                GameObject deathsphere = card.transform.GetChild(1).gameObject;
                deathsphere.transform.GetChild(0).GetComponent<MeshRenderer>().enabled = true;
            }
            yield return new WaitForSeconds(1f);
            foreach (GameObject card in cards)
            {
                GameObject deathsphere = card.transform.GetChild(1).gameObject;
                deathsphere.transform.GetChild(0).GetComponent<MeshRenderer>().enabled = false;
            }
            yield return new WaitForSeconds(1f);
            hasExploded = false;
        }
    }