Target selection and Activated abilities

PendingChoice/ChooseCommand let effects ask the player to pick a unit. Added Counter Blast and Soul Blast cost helpers. Blaster Blade implemented for both zones with its CB2 cost and rear-guard target. Activated abilities pay rest-self and discard; Lake Maiden Lien, Gojo and Shout draw a card. Seven tests.

IMPLEMENTATION_CHECKLIST.md

@@ -114,9 +114,9 @@
 - [ ] Discard, Shuffle как отдельные интенты.
 - [x] Число проверок принадлежит атакующей карте: 0–2 ранг — одна, 3+ — две; Арьергард по умолчанию без проверок; `DriveChecksOverride` меняет число (в том числе снимает двойную).
 - [x] Результат боя: `Hit` / `Guarded` как событие.
-- [x] Событийная шина: `Triggered` (OnRideOver, OnBoost), `Continuous` с пересчётом при запросе; `Activated` ещё нет.
+- [x] Событийная шина: `Triggered` (OnRideOver, OnPlace, OnBoost), `Continuous` с пересчётом при запросе, `Activated` (повернуть себя + сброс карты).
 - [x] Check Timing: сбор сработавших, порядок (активный игрок первым, выбор игрока), пауза на опциональные способности.
-- [ ] `Activated`-способности и выбор целей игроком.
+- [x] Выбор целей: `PendingChoice` + `ChooseCommand`, используется Blaster Blade для уничтожения Арьергарда противника.
 - [ ] Стоимости: CB, SB, discard, rest self, retire self, put to soul, return to deck.
 - [ ] Цели: авто по фильтру и выбор игроком, «до N» / «ровно N».
 - [~] Слои модификаторов силы/крита: усиления от триггеров живут до конца хода, постоянных слоёв нет.

server/src/Vanguard.Rules/Engine/Abilities/Abilities.cs

@@ -5,6 +5,7 @@ namespace Vanguard.Rules.Engine.Abilities;
 public enum AbilityTrigger
 {
     OnRideOver,
+    OnPlace,
     OnBoost,
     OnPhaseStart,
     OnAttackDeclared,
@@ -33,6 +34,12 @@ public sealed class AbilityDefinition
     public Func<AbilityContext, bool>? Condition { get; init; }
     public required Action<AbilityContext> Resolve { get; init; }
 
+    /// <summary>Проверка, что стоимость можно оплатить.</summary>
+    public Func<AbilityContext, bool>? CanPay { get; init; }
+
+    /// <summary>Оплата стоимости перед разрешением.</summary>
+    public Action<AbilityContext>? Pay { get; init; }
+
     /// <summary>«Вы можете» — движок спрашивает игрока перед разрешением.</summary>
     public bool Optional { get; init; }
 }
@@ -45,11 +52,24 @@ public sealed class ContinuousAbility
     public Func<AbilityContext, int>? CriticalBonus { get; init; }
 }
 
+/// <summary>
+/// Активируемая способность: игрок сам объявляет её в Основной фазе.
+/// Стоимость (повернуть себя, сбросить карту) оплачивает движок по описанию.
+/// </summary>
+public sealed class ActivatedAbility
+{
+    public required Func<AbilityContext, bool> CanActivate { get; init; }
+    public bool RestsSelf { get; init; }
+    public bool RequiresDiscard { get; init; }
+    public required Action<AbilityContext> Resolve { get; init; }
+}
+
 public abstract class CardScript
 {
     public abstract string NameId { get; }
     public virtual IEnumerable<AbilityDefinition> Abilities => Array.Empty<AbilityDefinition>();
     public virtual IEnumerable<ContinuousAbility> Continuous => Array.Empty<ContinuousAbility>();
+    public virtual IEnumerable<ActivatedAbility> Activated => Array.Empty<ActivatedAbility>();
 }
 
 /// <summary>Сработавшая способность, ожидающая выбора порядка или решения игрока.</summary>

server/src/Vanguard.Rules/Engine/Abilities/CardScripts.cs

@@ -11,9 +11,101 @@ public static class CardScripts
             ["barcgal"] = new BarcgalScript(),
             ["wingal"] = new WingalScript(),
             ["king-of-knights-alfred"] = new AlfredScript(),
+            ["blaster-blade"] = new BlasterBladeScript(),
+            ["lake-maiden-lien"] = new DrawOneScript("lake-maiden-lien"),
+            ["dragon-monk-gojo"] = new DrawOneScript("dragon-monk-gojo"),
+            ["screamin-and-dancin-announcer-shout"] = new DrawOneScript("screamin-and-dancin-announcer-shout"),
         };
 }
 
+/// <summary>
+/// «[ACT]: повернуть эту карту и сбросить карту из руки → взять карту».
+/// Общий скрипт для Lake Maiden, Lien, Dragon Monk, Gojo и Shout.
+/// </summary>
+public sealed class DrawOneScript : CardScript
+{
+    public DrawOneScript(string nameId) => NameId = nameId;
+
+    public override string NameId { get; }
+
+    public override IEnumerable<ActivatedAbility> Activated
+    {
+        get
+        {
+            yield return new ActivatedAbility
+            {
+                CanActivate = _ => true,
+                RestsSelf = true,
+                RequiresDiscard = true,
+                Resolve = ctx => ctx.Engine.DrawCards(ctx.Owner, 1),
+            };
+        }
+    }
+}
+
+/// <summary>
+/// Blaster Blade: при размещении оплатить Counter Blast 2 и уничтожить Арьергард противника.
+/// На Авангарде — любой, на Арьергарде — только 2 ранга или выше и при Авангарде Royal Paladin.
+/// </summary>
+public sealed class BlasterBladeScript : CardScript
+{
+    public override string NameId => "blaster-blade";
+
+    public override IEnumerable<AbilityDefinition> Abilities
+    {
+        get
+        {
+            yield return new AbilityDefinition
+            {
+                Trigger = AbilityTrigger.OnPlace,
+                Optional = true,
+                Condition = ctx => ctx.Engine.IsVanguardOf(ctx.Source, ctx.Owner),
+                CanPay = ctx => ctx.Engine.CanCounterBlast(ctx.Owner, 2),
+                Pay = ctx => ctx.Engine.CounterBlast(ctx.Owner, 2),
+                Resolve = ctx =>
+                {
+                    var opponent = 1 - ctx.Owner;
+                    var slots = ctx.Engine.RearGuardSlots(opponent, _ => true);
+                    if (slots.Count == 0)
+                        return;
+
+                    ctx.Engine.AskUnitChoice(
+                        ctx.Owner,
+                        opponent,
+                        "Выберите Арьергард противника",
+                        slots,
+                        slot => ctx.Engine.RetireRearGuard(opponent, slot));
+                },
+            };
+
+            yield return new AbilityDefinition
+            {
+                Trigger = AbilityTrigger.OnPlace,
+                Optional = true,
+                Condition = ctx =>
+                    !ctx.Engine.IsVanguardOf(ctx.Source, ctx.Owner) &&
+                    ctx.Engine.VanguardClan(ctx.Owner) == Clan.RoyalPaladin,
+                CanPay = ctx => ctx.Engine.CanCounterBlast(ctx.Owner, 2),
+                Pay = ctx => ctx.Engine.CounterBlast(ctx.Owner, 2),
+                Resolve = ctx =>
+                {
+                    var opponent = 1 - ctx.Owner;
+                    var slots = ctx.Engine.RearGuardSlots(opponent, d => d.Grade >= 2);
+                    if (slots.Count == 0)
+                        return;
+
+                    ctx.Engine.AskUnitChoice(
+                        ctx.Owner,
+                        opponent,
+                        "Выберите Арьергард противника 2 ранга или выше",
+                        slots,
+                        slot => ctx.Engine.RetireRearGuard(opponent, slot));
+                },
+            };
+        }
+    }
+}
+
 /// <summary>
 /// Barcgal: когда другой Royal Paladin сменяет эту карту, вы можете призвать её в круг Арьергарда.
 /// </summary>

server/src/Vanguard.Rules/Engine/GameCommands.cs

@@ -16,6 +16,8 @@ public sealed record PassGuardCommand : GameCommand;
 public sealed record ResolveTriggerCommand(int PowerTarget, int EffectTarget) : GameCommand;
 public sealed record SelectTriggerCommand(int Index) : GameCommand;
 public sealed record ResolveAbilityCommand(bool Accept) : GameCommand;
+public sealed record ChooseCommand(int Index) : GameCommand;
+public sealed record ActivateAbilityCommand(int InstanceId, string? DiscardPrintingId = null) : GameCommand;
 public sealed record EndTurnCommand : GameCommand;
 
 public sealed record CommandResult(bool Accepted, string? Reason)

server/src/Vanguard.Rules/Engine/GameEngine.cs

@@ -18,9 +18,8 @@ namespace Vanguard.Rules.Engine;
 ///     из заднего ряда — только если эффект разрешил (InterceptFromBackRow);
 ///   * число проверок принадлежит атакующей карте: 0–2 ранг — одна, 3+ — две;
 ///     Арьергард по умолчанию без проверок, но эффект может их выдать;
-///   * способности карт подключаются скриптами (CardScript): Triggered и Continuous;
-///     Check Timing собирает сработавшие, активный игрок выбирает порядок,
-///     опциональные способности ждут ResolveAbilityCommand;
+///   * способности карт: Triggered, Continuous и Activated; выбор цели идёт через
+///     PendingChoice (ChooseCommand), порядок триггеров выбирает активный игрок;
 ///   * непрерывные эффекты пересчитываются при каждом запросе (EffectivePower);
 ///   * триггер требует выбора целей через ResolveTriggerCommand:
 ///     +5000 любой карте в кругах Авангарда или Арьергарда, затем второй эффект;
@@ -115,9 +114,15 @@ public sealed class GameEngine
 
     private void OfferAbility(TriggeredAbility ability)
     {
-        _events.Add(new AbilityTriggeredEvent(ability.Owner, ability.Context.Source.PrintingId, ability.Definition.Trigger));
+        var definition = ability.Definition;
 
-        if (ability.Definition.Optional)
+        // если стоимость оплатить нельзя, способность не предлагается
+        if (definition.CanPay is not null && !definition.CanPay(ability.Context))
+            return;
+
+        _events.Add(new AbilityTriggeredEvent(ability.Owner, ability.Context.Source.PrintingId, definition.Trigger));
+
+        if (definition.Optional)
         {
             State.PendingAbility = ability;
             State.Step = Step.Ability;
@@ -131,26 +136,126 @@ public sealed class GameEngine
     private void ResolveAbility(TriggeredAbility ability, bool accepted)
     {
         if (accepted)
+        {
+            ability.Definition.Pay?.Invoke(ability.Context);
             ability.Definition.Resolve(ability.Context);
+        }
 
         _events.Add(new AbilityResolvedEvent(ability.Owner, ability.Context.Source.PrintingId, accepted));
 
+        // способность попросила выбрать цель — ждём ChooseCommand
+        if (State.Step == Step.Choice)
+            return;
+
+        ContinueOrder();
+    }
+
+    private void ContinueOrder()
+    {
         if (State.PendingOrder is { Count: > 0 } order)
         {
-            var next = order[0];
-            order.RemoveAt(0);
-
-            if (order.Count == 0)
+            if (order.Count == 1)
+            {
+                var next = order[0];
                 State.PendingOrder = null;
+                State.ActivePlayer = next.Owner;
+                OfferAbility(next);
+                return;
+            }
 
-            State.ActivePlayer = next.Owner;
-            OfferAbility(next);
+            State.Step = Step.Ability;
+            State.ActivePlayer = order[0].Owner;
             return;
         }
 
         State.Step = Step.None;
     }
 
+    private CommandResult Activate(int instanceId, string? discardPrintingId)
+    {
+        if (State.Phase != Phase.Main)
+            return CommandResult.Reject("Активируемые способности доступны только в Основной фазе.");
+
+        if (State.Step != Step.None || State.PendingAbility is not null || State.PendingChoice is not null)
+            return CommandResult.Reject("Сейчас нельзя активировать способности.");
+
+        var player = State.ActivePlayer;
+        var p = State.Players[player];
+        var unit = AllUnits(player).FirstOrDefault(u => u.Id == instanceId);
+        if (unit is null)
+            return CommandResult.Reject("Карта не на поле.");
+
+        var nameId = State.Catalog.CardOf(unit.PrintingId).NameId;
+        if (!_scripts.TryGetValue(nameId, out var script))
+            return CommandResult.Reject("У карты нет способностей.");
+
+        var context = new AbilityContext
+        {
+            Engine = this,
+            Source = unit,
+            Owner = player,
+            Phase = State.Phase,
+        };
+
+        var ability = script.Activated.FirstOrDefault(a => a.CanActivate(context));
+        if (ability is null)
+            return CommandResult.Reject("Нет доступной способности.");
+
+        if (ability.RestsSelf && unit.Rested)
+            return CommandResult.Reject("Карта уже повёрнута.");
+
+        CardInstance? discard = null;
+        if (ability.RequiresDiscard)
+        {
+            if (discardPrintingId is null)
+                return CommandResult.Reject("Нужно выбрать карту для сброса.");
+
+            var index = p.Hand.FindIndex(c => c.PrintingId == discardPrintingId);
+            if (index < 0)
+                return CommandResult.Reject("Карты для сброса нет в руке.");
+
+            discard = p.Hand[index];
+        }
+
+        if (ability.RestsSelf)
+            unit.Rested = true;
+
+        if (discard is not null)
+        {
+            p.Hand.Remove(discard);
+            p.Drop.Add(discard);
+        }
+
+        ability.Resolve(context);
+        _events.Add(new AbilityResolvedEvent(player, unit.PrintingId, true));
+
+        return CommandResult.Ok();
+    }
+
+    private CommandResult Choose(int index)
+    {
+        var choice = State.PendingChoice;
+        if (choice is null || State.Step != Step.Choice)
+            return CommandResult.Reject("Сейчас нет выбора.");
+
+        if (State.ActivePlayer != choice.Player)
+            return CommandResult.Reject("Сейчас выбирает другой игрок.");
+
+        if (index < 0 || index >= choice.Options.Count)
+            return CommandResult.Reject("Некорректный вариант выбора.");
+
+        var option = choice.Options[index];
+        State.PendingChoice = null;
+        State.Step = Step.None;
+
+        choice.Resolve(option.Slot);
+
+        if (State.Step != Step.Choice)
+            ContinueOrder();
+
+        return CommandResult.Ok();
+    }
+
     private CommandResult SelectTrigger(int index)
     {
         var order = State.PendingOrder;
@@ -261,6 +366,107 @@ public sealed class GameEngine
             battle.AbilityPower += amount;
     }
 
+    // ---------- стоимости ----------
+
+    public int FaceDownDamage(int player) =>
+        State.Players[player].Damage.Count(c => !c.FaceUp);
+
+    public bool CanCounterBlast(int player, int amount) =>
+        FaceDownDamage(player) >= amount;
+
+    public void CounterBlast(int player, int amount)
+    {
+        var flipped = 0;
+        foreach (var card in State.Players[player].Damage)
+        {
+            if (flipped == amount)
+                break;
+
+            if (card.FaceUp)
+                continue;
+
+            card.FaceUp = true;
+            flipped++;
+        }
+    }
+
+    public bool CanSoulBlast(int player, int amount) =>
+        State.Players[player].Soul.Count >= amount;
+
+    public void SoulBlast(int player, int amount)
+    {
+        var soul = State.Players[player].Soul;
+        for (var i = 0; i < amount && soul.Count > 0; i++)
+        {
+            var card = soul[0];
+            soul.RemoveAt(0);
+            State.Players[player].Drop.Add(card);
+        }
+    }
+
+    // ---------- выбор целей ----------
+
+    /// <summary>Круги Арьергарда игрока, подходящие под фильтр.</summary>
+    public IReadOnlyList<int> RearGuardSlots(int player, Func<CardDefinition, bool> predicate)
+    {
+        var slots = new List<int>();
+        for (var slot = 0; slot < PlayerState.RearGuardSlots; slot++)
+        {
+            var unit = State.Players[player].RearGuards[slot];
+            if (unit is null)
+                continue;
+
+            if (predicate(State.Catalog.CardOf(unit.PrintingId)))
+                slots.Add(slot);
+        }
+
+        return slots;
+    }
+
+    /// <summary>Останавливает разрешение и просит игрока выбрать карту на поле.</summary>
+    public void AskUnitChoice(
+        int chooser,
+        int targetPlayer,
+        string prompt,
+        IReadOnlyList<int> slots,
+        Action<int> onChosen)
+    {
+        var options = slots
+            .Select(slot =>
+            {
+                var unit = State.GetUnit(targetPlayer, slot)!;
+                return new ChoiceOption(slot, State.Catalog.CardOf(unit.PrintingId).NameEn);
+            })
+            .ToList();
+
+        State.PendingChoice = new PendingChoice
+        {
+            Player = chooser,
+            Prompt = prompt,
+            Options = options,
+            Resolve = onChosen,
+        };
+        State.Step = Step.Choice;
+        State.ActivePlayer = chooser;
+    }
+
+    public void RetireRearGuard(int player, int slot)
+    {
+        var unit = State.Players[player].RearGuards[slot];
+        if (unit is null)
+            return;
+
+        State.Players[player].RearGuards[slot] = null;
+        State.Players[player].Drop.Add(unit);
+        _events.Add(new UnitRetiredEvent(player, slot));
+    }
+
+    public Clan VanguardClan(int player)
+    {
+        var vanguard = State.Players[player].Vanguard;
+        return vanguard is null ? Clan.RoyalPaladin : State.Catalog.CardOf(vanguard.PrintingId).Clan;
+    }
+
     // ---------- старт партии ----------
 
     public void Start()
@@ -332,6 +538,8 @@ public sealed class GameEngine
         ResolveTriggerCommand c => ResolveTrigger(c),
         SelectTriggerCommand c => SelectTrigger(c.Index),
         ResolveAbilityCommand c => ResolvePendingAbility(c.Accept),
+        ChooseCommand c => Choose(c.Index),
+        ActivateAbilityCommand c => Activate(c.InstanceId, c.DiscardPrintingId),
         EndTurnCommand => EndTurn(),
         _ => CommandResult.Reject("Неизвестная команда."),
     };
@@ -404,7 +612,10 @@ public sealed class GameEngine
         State.Phase = Phase.Main;
         _events.Add(new PhaseChangedEvent(State.ActivePlayer, Phase.Main));
 
-        TriggerFromCard(State.ActivePlayer, riddenOver, AbilityTrigger.OnRideOver, card);
+        TriggerFromCard(State.ActivePlayer, card, AbilityTrigger.OnPlace, null);
+
+        if (State.Step == Step.None)
+            TriggerFromCard(State.ActivePlayer, riddenOver, AbilityTrigger.OnRideOver, card);
 
         return CommandResult.Ok();
     }
@@ -441,6 +652,9 @@ public sealed class GameEngine
         player.RearGuards[slot] = card;
 
         _events.Add(new UnitCalledEvent(State.ActivePlayer, slot, card.PrintingId));
+
+        TriggerFromCard(State.ActivePlayer, card, AbilityTrigger.OnPlace, null);
+
         return CommandResult.Ok();
     }
 
@@ -1050,6 +1264,8 @@ public sealed class GameEngine
         return card;
     }
 
+    public void DrawCards(int player, int count) => Draw(player, count);
+
     private void Draw(int player, int count)
     {
         for (var i = 0; i < count; i++)

server/src/Vanguard.Rules/Engine/GameModels.cs

@@ -20,6 +20,22 @@ public enum Step
     Drive,
     Trigger,
     Ability,
+    Choice,
+}
+
+/// <summary>Вариант выбора, который предлагается игроку.</summary>
+public sealed record ChoiceOption(int Slot, string Label);
+
+/// <summary>
+/// Ожидание выбора игрока. Resolve получает индекс выбранного варианта.
+/// Пока выбор не сделан, движок не продолжает разрешение способности.
+/// </summary>
+public sealed class PendingChoice
+{
+    public required int Player { get; init; }
+    public required string Prompt { get; init; }
+    public required IReadOnlyList<ChoiceOption> Options { get; init; }
+    public required Action<int> Resolve { get; init; }
 }
 
 public enum TriggerContext

server/src/Vanguard.Rules/Engine/GameState.cs

@@ -60,6 +60,9 @@ public sealed class GameState
     /// <summary>Сработавшие способности ждут выбора порядка.</summary>
     public List<TriggeredAbility>? PendingOrder { get; internal set; }
 
+    /// <summary>Ожидание выбора цели или карты.</summary>
+    public PendingChoice? PendingChoice { get; internal set; }
+
     public bool IsFinished { get; internal set; }
     public int? Winner { get; internal set; }
 

server/tests/Vanguard.Rules.Tests/GameEngineTests.cs

@@ -21,6 +21,7 @@ public class GameEngineTests
     private const string Conroe = "BT01/016EN";    // Kagero, grade 0 без триггера
     private const string BlasterBlade = "BT01/002EN";
     private const string Wingal = "BT01/044EN";
+    private const string Lien = "BT01/043EN";      // activated: rest + discard → draw
 
     [Fact]
     public void Start_Places_Starting_Vanguard_And_Draws_Five()
@@ -624,6 +625,107 @@ public class GameEngineTests
         Assert.DoesNotContain(engine.Events, e => e is UnitRetiredEvent);
     }
 
+    [Fact]
+    public void BlasterBlade_On_Vanguard_Retires_Chosen_RearGuard()
+    {
+        var engine = StartedEngine();
+        SetVanguard(engine, 0, Marron);
+        GiveDamage(engine, 0, 2);
+
+        var opponent = engine.State.Players[1];
+        opponent.RearGuards[0] = TakeFromDeck(opponent, Gallatin);
+
+        Give(engine, 0, BlasterBlade);
+        Assert.True(engine.Execute(new RideCommand(BlasterBlade)).Accepted);
+
+        Assert.NotNull(engine.State.PendingAbility);
+        Assert.True(engine.Execute(new ResolveAbilityCommand(true)).Accepted);
+
+        Assert.NotNull(engine.State.PendingChoice);
+        Assert.Single(engine.State.PendingChoice!.Options);
+
+        Assert.True(engine.Execute(new ChooseCommand(0)).Accepted);
+
+        Assert.Null(opponent.RearGuards[0]);
+        Assert.Equal(2, engine.State.Players[0].Damage.Count(c => c.FaceUp));
+    }
+
+    [Fact]
+    public void BlasterBlade_Is_Not_Offered_Without_Counter_Blast()
+    {
+        var engine = StartedEngine();
+        SetVanguard(engine, 0, Marron);
+        Give(engine, 0, BlasterBlade);
+
+        Assert.True(engine.Execute(new RideCommand(BlasterBlade)).Accepted);
+
+        Assert.Null(engine.State.PendingAbility);
+    }
+
+    [Fact]
+    public void BlasterBlade_On_RearGuard_Requires_RoyalPaladin_Vanguard()
+    {
+        var kagero = StartedEngine();
+        kagero.Execute(new SkipRideCommand());
+        Give(kagero, 0, BlasterBlade);
+        kagero.Execute(new CallCommand(BlasterBlade, 0));
+
+        Assert.Null(kagero.State.PendingAbility);
+
+        var royal = StartedEngine();
+        SetVanguard(royal, 0, Marron);
+        royal.Execute(new SkipRideCommand());
+        GiveDamage(royal, 0, 2);
+        Give(royal, 0, BlasterBlade);
+        royal.Execute(new CallCommand(BlasterBlade, 0));
+
+        Assert.NotNull(royal.State.PendingAbility);
+    }
+
+    [Fact]
+    public void Activated_Ability_Rests_Self_Discards_And_Draws()
+    {
+        var engine = InMainPhase();
+        Give(engine, 0, Lien);
+        engine.Execute(new CallCommand(Lien, 0));
+
+        var lien = engine.State.Players[0].RearGuards[0]!;
+        lien.Rested = false;
+
+        Give(engine, 0, Marron);
+        var handBefore = engine.State.Players[0].Hand.Count;
+
+        Assert.True(engine.Execute(new ActivateAbilityCommand(lien.Id, Marron)).Accepted);
+
+        Assert.True(lien.Rested);
+        Assert.Contains(engine.State.Players[0].Drop, c => c.PrintingId == Marron);
+        Assert.Equal(handBefore, engine.State.Players[0].Hand.Count); // -1 сброс, +1 добор
+    }
+
+    [Fact]
+    public void Activated_Ability_Requires_Discard()
+    {
+        var engine = InMainPhase();
+        Give(engine, 0, Lien);
+        engine.Execute(new CallCommand(Lien, 0));
+        var lien = engine.State.Players[0].RearGuards[0]!;
+        lien.Rested = false;
+
+        Assert.False(engine.Execute(new ActivateAbilityCommand(lien.Id)).Accepted);
+    }
+
+    [Fact]
+    public void Activated_Ability_Rejects_Rested_Card()
+    {
+        var engine = InMainPhase();
+        Give(engine, 0, Lien);
+        engine.Execute(new CallCommand(Lien, 0));
+        var lien = engine.State.Players[0].RearGuards[0]!;
+        Give(engine, 0, Marron);
+
+        Assert.False(engine.Execute(new ActivateAbilityCommand(lien.Id, Marron)).Accepted);
+    }
+
     [Fact]
     public void ResolveTrigger_Rejects_When_Nothing_Is_Pending()
     {
@@ -760,6 +862,7 @@ public class GameEngineTests
         (Nike, 2), (Flogal, 2), (Govannon, 2),
         (Iseult, 2), (Nehalem, 2), (Overlord, 2), (Conroe, 2),
         (BlasterBlade, 2), (Wingal, 2),
+        (Lien, 2),
     };
 
     private List<string> BuildDeck()
@@ -822,6 +925,19 @@ public class GameEngineTests
             player.Deck.Insert(0, cards[i]);
     }
 
+    private static void GiveDamage(GameEngine engine, int player, int amount)
+    {
+        var p = engine.State.Players[player];
+        for (var i = 0; i < amount; i++)
+        {
+            Assert.NotEmpty(p.Deck);
+            var card = p.Deck[0];
+            p.Deck.RemoveAt(0);
+            card.FaceUp = false;
+            p.Damage.Add(card);
+        }
+    }
+
     private static void SetVanguard(GameEngine engine, int player, string printingId)
     {
         var p = engine.State.Players[player];