[M21] Implement more cards (#6730)

* EnthrallingHold

* ArchfiendsVessel

* ConspicuousSnoop

* HoodedBlightfang

* commit set updates

* fix text

* fix Archfiend's Vessel cast from graveyard trigger and Enthralling Hold text

Mage/src/main/java/mage/abilities/common/AttacksCreatureYouControlTriggeredAbility.java

@@ -76,9 +76,9 @@ public class AttacksCreatureYouControlTriggeredAbility extends TriggeredAbilityI
     public String getRule() {
         String an;
         String who = filter.getMessage();
-        if (who.startsWith("another")) {
+        if (who.startsWith("another") || who.startsWith("a ")) {
             an = "";
-        } else if (who.startsWith("a")) {
+        } else if (who.length() > 0 && "aeiou".contains(who.charAt(0) + "")) {
             an = "an ";
         } else {
             an = "a ";

Mage/src/main/java/mage/abilities/common/DestroyPlaneswalkerWhenDamagedTriggeredAbility.java

@@ -0,0 +1,62 @@
+package mage.abilities.common;
+
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.effects.Effect;
+import mage.abilities.effects.common.DestroyTargetEffect;
+import mage.constants.Zone;
+import mage.filter.FilterPermanent;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.target.targetpointer.FixedTarget;
+
+public class DestroyPlaneswalkerWhenDamagedTriggeredAbility extends TriggeredAbilityImpl {
+
+    private final FilterPermanent filter;
+
+    public DestroyPlaneswalkerWhenDamagedTriggeredAbility() {
+        this((FilterPermanent) null);
+    }
+
+    public DestroyPlaneswalkerWhenDamagedTriggeredAbility(FilterPermanent filter) {
+        super(Zone.BATTLEFIELD, null);
+        this.filter = filter;
+    }
+
+    private DestroyPlaneswalkerWhenDamagedTriggeredAbility(final DestroyPlaneswalkerWhenDamagedTriggeredAbility effect) {
+        super(effect);
+        this.filter = effect.filter;
+    }
+
+    @Override
+    public DestroyPlaneswalkerWhenDamagedTriggeredAbility copy() {
+        return new DestroyPlaneswalkerWhenDamagedTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.DAMAGED_PLANESWALKER;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        Permanent permanent = getSourcePermanentIfItStillExists(game);
+        if (permanent != null) {
+            boolean applies = filter != null ?
+                filter.match(permanent, game) : event.getSourceId().equals(getSourceId());
+            if (applies) {
+                Effect effect = new DestroyTargetEffect();
+                effect.setTargetPointer(new FixedTarget(event.getTargetId(), game));
+                this.getEffects().clear();
+                this.addEffect(effect);
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public String getRule() {
+        return "Whenever " + (filter != null ? filter.getMessage() : "this creature") + " deals damage to a planeswalker, destroy that planeswalker.";
+    }
+}

Mage/src/main/java/mage/abilities/effects/common/GainActivatedAbilitiesOfTopCardEffect.java

@@ -0,0 +1,56 @@
+package mage.abilities.effects.common;
+
+import mage.abilities.Ability;
+import mage.abilities.ActivatedAbility;
+import mage.abilities.effects.ContinuousEffectImpl;
+import mage.cards.Card;
+import mage.constants.Duration;
+import mage.constants.Layer;
+import mage.constants.Outcome;
+import mage.constants.SubLayer;
+import mage.filter.FilterCard;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+
+public class GainActivatedAbilitiesOfTopCardEffect extends ContinuousEffectImpl {
+
+    private final FilterCard filter;
+
+    public GainActivatedAbilitiesOfTopCardEffect(FilterCard filter) {
+        super(Duration.WhileOnBattlefield, Layer.AbilityAddingRemovingEffects_6, SubLayer.NA, Outcome.AddAbility);
+        staticText = "As long as the top card of your library is " + filter.getMessage() + ", {this} has all activated abilities of that card";
+        this.filter = filter;
+    }
+
+    public GainActivatedAbilitiesOfTopCardEffect(final GainActivatedAbilitiesOfTopCardEffect effect) {
+        super(effect);
+        this.filter = effect.filter;
+    }
+
+    @Override
+    public GainActivatedAbilitiesOfTopCardEffect copy() {
+        return new GainActivatedAbilitiesOfTopCardEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        if (player != null) {
+            Card card = player.getLibrary().getFromTop(game);
+            if (card != null && filter.match(card, game)) {
+                Permanent permanent = game.getPermanent(source.getSourceId());
+                if (permanent != null) {
+                    for (Ability ability : card.getAbilities(game)) {
+                        if (ability instanceof ActivatedAbility) {
+                            permanent.addAbility(ability, source.getSourceId(), game);
+                        }
+                    }
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+}