DCGO/Assets/Scripts/CardEffect/BT4/Yellow/BT4_049.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Linq;
using Photon;
using System;
using Photon.Pun;

public class BT4_049 : CEntity_Effect
{
    public override List<ICardEffect> CardEffects(EffectTiming timing, CardSource card)
    {
        List<ICardEffect> cardEffects = new List<ICardEffect>();

        if (timing == EffectTiming.OnDeclaration)
        {
            ActivateClass activateClass = new ActivateClass();
            activateClass.SetUpICardEffect("DP -4000 to opponent's all Digimon", CanUseCondition, card);
            activateClass.SetUpActivateClass(null, ActivateCoroutine, -1, false, EffectDiscription());
            cardEffects.Add(activateClass);

            string EffectDiscription()
            {
                return "[Main] <Digi-Burst 3> (Trash 3 of this Digimon's digivolution cards to activate the effect below.) - All of your opponent's Digimon get -4000 DP for the turn.";
            }

            bool CanUseCondition(Hashtable hashtable)
            {
                if (CardEffectCommons.IsExistOnBattleArea(card))
                {
                    if (new IDigiBurst(card.PermanentOfThisCard(), 3, activateClass).CanDigiBurst())
                    {
                        return true;
                    }
                }

                return false;
            }

            IEnumerator ActivateCoroutine(Hashtable _hashtable)
            {
                yield return ContinuousController.instance.StartCoroutine(new IDigiBurst(card.PermanentOfThisCard(), 3, activateClass).DigiBurst());

                bool PermanentCondition(Permanent permanent)
                {
                    return CardEffectCommons.IsPermanentExistsOnOpponentBattleAreaDigimon(permanent, card);
                }

                yield return ContinuousController.instance.StartCoroutine(CardEffectCommons.ChangeDigimonDPPlayerEffect(
                    permanentCondition: PermanentCondition,
                    changeValue: -4000,
                    effectDuration: EffectDuration.UntilEachTurnEnd,
                    activateClass: activateClass));
            }
        }

        return cardEffects;
    }
}