DCGO/Assets/Scripts/CardEffect/ST3/Yellow/ST3_16.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Linq;
using Photon;
using System;
using Photon.Pun;
public class ST3_16 : CEntity_Effect
{
    public override List<ICardEffect> CardEffects(EffectTiming timing, CardSource card)
    {
        List<ICardEffect> cardEffects = new List<ICardEffect>();

        if (timing == EffectTiming.OptionSkill)
        {
            ActivateClass activateClass = new ActivateClass();
            activateClass.SetUpICardEffect(card.BaseENGCardNameFromEntity, CanUseCondition, card);
            activateClass.SetUpActivateClass(null, ActivateCoroutine, -1, false, EffectDiscription());
            cardEffects.Add(activateClass);

            string EffectDiscription()
            {
                return "[Main] 1 of your opponent's Digimon gets -10000 DP for the turn.";
            }

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

            bool CanUseCondition(Hashtable hashtable)
            {
                return CardEffectCommons.CanTriggerOptionMainEffect(hashtable, card);
            }

            IEnumerator ActivateCoroutine(Hashtable _hashtable)
            {
                if (CardEffectCommons.HasMatchConditionPermanent(CanSelectPermanentCondition))
                {
                    int maxCount = Math.Min(1, CardEffectCommons.MatchConditionPermanentCount(CanSelectPermanentCondition));

                    SelectPermanentEffect selectPermanentEffect = GManager.instance.GetComponent<SelectPermanentEffect>();

                    selectPermanentEffect.SetUp(
                        selectPlayer: card.Owner,
                        canTargetCondition: CanSelectPermanentCondition,
                        canTargetCondition_ByPreSelecetedList: null,
                        canEndSelectCondition: null,
                        maxCount: maxCount,
                        canNoSelect: false,
                        canEndNotMax: false,
                        selectPermanentCoroutine: SelectPermanentCoroutine,
                        afterSelectPermanentCoroutine: null,
                        mode: SelectPermanentEffect.Mode.Custom,
                        cardEffect: activateClass);

                    selectPermanentEffect.SetUpCustomMessage("Select 1 Digimon that will get DP -10000.", "The opponent is selecting 1 Digimon that will get DP -10000.");

                    yield return ContinuousController.instance.StartCoroutine(selectPermanentEffect.Activate());

                    IEnumerator SelectPermanentCoroutine(Permanent permanent)
                    {
                        yield return ContinuousController.instance.StartCoroutine(CardEffectCommons.ChangeDigimonDP(targetPermanent: permanent, changeValue: -10000, effectDuration: EffectDuration.UntilEachTurnEnd, activateClass: activateClass));
                    }
                }
            }
        }

        if (timing == EffectTiming.SecuritySkill)
        {
            CardEffectCommons.AddActivateMainOptionSecurityEffect(card: card, cardEffects: ref cardEffects, effectName: $"DP -10000");
        }

        return cardEffects;
    }
}