Dump.cs

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

public class Dump : MonoBehaviour
{
    public Stack<Card> dumpStack;

    public static Dump Instance
    {
        private set;
        get;
    }

    private void Awake()
    {
        if(Instance == null)
        {
            Instance = this;
        }
        else
        {
            DestroyImmediate(this);
        }

        dumpStack = new Stack<Card>();
    }

    public void Discard(Card card)
    {
        // duplication flags are cleared on discard
        card.OnCardPlayed(delegate {
            DiscardNoAnim(card);
        });
    }

    public void DiscardNoAnim(Card card)
    {
        CardEvent<Card>.Trigger(Event.CARD_DISCARD, card);
        card.transform.SetParent(transform);
        card.gameObject.SetActive(false); dumpStack.Push(card);
    }

    public void Init()
    {
        if (Instance == null)
        {
            Instance = this;
        }
        else if(Instance != this)
        {
            DestroyImmediate(this);
        }

        dumpStack = new Stack<Card>();
    }


    public Stack<Card> Recycle ()
    {
        Stack<Card> result = new Stack<Card>();

        while(dumpStack.Count >0)
        {
            result.Push(dumpStack.Pop());
        }

        return result;
    }

    public Card Draw()
    {
        return dumpStack.Pop();
    }



}