DCGO/Assets/Scripts/CardEffect/ST5/Black/ST5_15.cs

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

public class ST5_15 : 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] Trigger <De-Digivolve 1> on up to 2 of your opponent's Digimon. (Trash a card from the top of one of your opponent's Digimon. If it has no digivolution cards, or becomes a level 3 Digimon, you can't trash any more cards.)";
            }

            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(2, CardEffectCommons.MatchConditionPermanentCount(CanSelectPermanentCondition));

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

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

                    selectPermanentEffect.SetUpCustomMessage("Select Digimon to De-Digivolve.", "The opponent is selecting Digimon to De-Digivolve.");
                    yield return ContinuousController.instance.StartCoroutine(selectPermanentEffect.Activate());

                    bool CanEndSelectCondition(List<Permanent> permanents)
                    {
                        if (CardEffectCommons.HasNoElement(permanents))
                        {
                            return false;
                        }

                        return true;
                    }

                    IEnumerator SelectPermanentCoroutine(Permanent permanent)
                    {
                        yield return ContinuousController.instance.StartCoroutine(new IDegeneration(permanent, 1, activateClass).Degeneration());
                    }
                }
            }
        }

        if (timing == EffectTiming.SecuritySkill)
        {
            CardEffectCommons.AddActivateMainOptionSecurityEffect(card: card, cardEffects: ref cardEffects, effectName: $"De-Digivolve 1 to 2 Digimon");
        }

        return cardEffects;
    }
}