[40K] Implemented Gargoyle Flock

Mage/src/main/java/mage/abilities/condition/common/CreatureEnteredUnderYourControlCondition.java

@@ -0,0 +1,23 @@
+package mage.abilities.condition.common;
+
+import mage.abilities.Ability;
+import mage.abilities.condition.Condition;
+import mage.game.Game;
+import mage.watchers.common.CreatureEnteredControllerWatcher;
+
+/**
+ * @author TheElk801
+ */
+public enum CreatureEnteredUnderYourControlCondition implements Condition {
+    instance;
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return CreatureEnteredControllerWatcher.enteredCreatureForPlayer(source.getControllerId(), game);
+    }
+
+    @Override
+    public String toString() {
+        return "a creature entered the battlefield under your control this turn";
+    }
+}

Mage/src/main/java/mage/game/permanent/token/TyranidGargoyleToken.java

@@ -0,0 +1,37 @@
+package mage.game.permanent.token;
+
+import mage.MageInt;
+import mage.abilities.keyword.FlyingAbility;
+import mage.constants.CardType;
+import mage.constants.SubType;
+
+import java.util.Arrays;
+
+/**
+ * @author TheElk801
+ */
+public final class TyranidGargoyleToken extends TokenImpl {
+
+    public TyranidGargoyleToken() {
+        super("Tyranid Gargoyle Token", "1/1 blue Tyranid creature token with flying");
+        cardType.add(CardType.CREATURE);
+        color.setBlue(true);
+        subtype.add(SubType.TYRANID);
+        subtype.add(SubType.GARGOYLE);
+        power = new MageInt(1);
+        toughness = new MageInt(1);
+
+        addAbility(FlyingAbility.getInstance());
+
+        availableImageSetCodes.addAll(Arrays.asList("40K"));
+    }
+
+    public TyranidGargoyleToken(final TyranidGargoyleToken token) {
+        super(token);
+    }
+
+    @Override
+    public TyranidGargoyleToken copy() {
+        return new TyranidGargoyleToken(this);
+    }
+}

Mage/src/main/java/mage/watchers/common/CreatureEnteredControllerWatcher.java

@@ -0,0 +1,48 @@
+package mage.watchers.common;
+
+import mage.constants.WatcherScope;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.events.ZoneChangeEvent;
+import mage.watchers.Watcher;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public class CreatureEnteredControllerWatcher extends Watcher {
+
+    private final Set<UUID> players = new HashSet<>();
+
+    public CreatureEnteredControllerWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() == GameEvent.EventType.ZONE_CHANGE) {
+            ZoneChangeEvent zEvent = (ZoneChangeEvent) event;
+            if (zEvent.getToZone() == Zone.BATTLEFIELD
+                    && zEvent.getTarget().isCreature(game)) {
+                players.add(zEvent.getTarget().getControllerId());
+            }
+        }
+    }
+
+    @Override
+    public void reset() {
+        players.clear();
+    }
+
+    public static boolean enteredCreatureForPlayer(UUID playerId, Game game) {
+        return game
+                .getState()
+                .getWatcher(CreatureEnteredControllerWatcher.class)
+                .players
+                .contains(playerId);
+    }
+}