implement [PIP] Tato Farmer

Mage/src/main/java/mage/filter/predicate/card/MilledThisTurnPredicate.java

@@ -0,0 +1,23 @@
+package mage.filter.predicate.card;
+
+import mage.MageObjectReference;
+import mage.cards.Card;
+import mage.filter.predicate.Predicate;
+import mage.game.Game;
+import mage.watchers.common.CardsMilledWatcher;
+
+/**
+ * Needs CardsMilledWatcher to work.
+ *
+ * @author Susucr
+ */
+public enum MilledThisTurnPredicate implements Predicate<Card> {
+    instance;
+
+    @Override
+    public boolean apply(Card input, Game game) {
+        return CardsMilledWatcher.wasMilledThisTurn(
+                new MageObjectReference(input.getMainCard(), game), game
+        );
+    }
+}

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

@@ -0,0 +1,56 @@
+package mage.watchers.common;
+
+import mage.MageObjectReference;
+import mage.cards.Card;
+import mage.constants.WatcherScope;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.watchers.Watcher;
+
+import java.util.*;
+
+/**
+ * Track MOR of mainCard milled this turn.
+ *
+ * @author Susucr
+ */
+public class CardsMilledWatcher extends Watcher {
+
+    // set of Cards (the main card's mor) milled this turn.
+    private final Set<MageObjectReference> milledThisTurn = new HashSet<>();
+
+    public CardsMilledWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() != GameEvent.EventType.MILLED_CARD) {
+            return;
+        }
+        Card card = game.getCard(event.getTargetId());
+        if (card == null) {
+            return;
+        }
+        Card mainCard = card.getMainCard();
+        if (game.getState().getZone(mainCard.getId()) != Zone.GRAVEYARD) {
+            // Ensure that the current zone is indeed the graveyard
+            return;
+        }
+        milledThisTurn.add(new MageObjectReference(mainCard, game));
+    }
+
+    @Override
+    public void reset() {
+        super.reset();
+        milledThisTurn.clear();
+    }
+
+    public static boolean wasMilledThisTurn(MageObjectReference morMainCard, Game game) {
+        CardsMilledWatcher watcher = game.getState().getWatcher(CardsMilledWatcher.class);
+        return watcher != null && watcher
+                .milledThisTurn
+                .contains(morMainCard);
+    }
+}