ArgumentOutOfRangeException Don't know how to fix it.

Hello im working on a card game right now. My last action was making Draw system but i got this error. Tried everything i know but dont know how to fix it. Can someone help me? Thanks.

Error: ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index System.Collections.Generic.List`1[T].get_Item (System.Int32 index) (at :0) DisplayCard.Update () (at Assets/Scripts/DisplayCard.cs:84)

Code

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 using UnityEngine.EventSystems;
 
 
 
 public class DisplayCard : MonoBehaviour
 {
     public List<Card> displayCard = new List<Card>();
     public int displayId;
 
     public int id;
     public string cardName;
     public int cost;
     public int power;
     public string cardDescription;
     public Sprite spriteImage;
 
     public Text nameText;
     public Text costText;
     public Text powerText;
     public Text descriptionText;
     public Image artImage;
 
     public bool cardBack;
     public static bool staticCardBack;
 
     public GameObject Hand;
     public int numberOfCardsInDeck;
 
 
 
 
 
 
     
     
     // Start is called before the first frame update
     void Start()
     {
 
         numberOfCardsInDeck = PlayerDeck.deckSize;
 
         
         //displayCard[0] = CardDatabase.cardList[displayId];
         displayCard.Add(CardDatabase.cardList[displayId]);
 
     }
 
     // Update is called once per frame
     void Update()
     {
         
         id = displayCard[0].id;
         cardName = displayCard[0].cardName;
         cost = displayCard[0].cost;
         power = displayCard[0].power;
         cardDescription = displayCard[0].cardDescription;
         spriteImage = displayCard[0].spriteImage;
 
 
 
 
 
         nameText.text = " " + cardName;
         costText.text = " " + cost;
         powerText.text = " " + power;
         descriptionText.text = " " + cardDescription;
         artImage.sprite = spriteImage;
 
 
         Hand = GameObject.Find("Hand");
         if(this.transform.parent == Hand.transform.parent)
         {
             cardBack = false;
         }
 
         staticCardBack = cardBack;
 
         if (this.tag == "Clone")
         {
             displayCard[0] = PlayerDeck.staticDeck[numberOfCardsInDeck-1];
             numberOfCardsInDeck -=1;
             PlayerDeck.deckSize -=1;
             cardBack = false;
             this.tag = "Untagged";
 
         }
         
 
 
 
     }
 }