[MOM] Implement War-Trained Slasher

Mage.Sets/src/mage/cards/w/WarTrainedSlasher.java

@@ -0,0 +1,115 @@
+package mage.cards.w;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.continuous.BoostSourceEffect;
+import mage.abilities.keyword.MenaceAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+
+import java.util.Objects;
+import java.util.Optional;
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class WarTrainedSlasher extends CardImpl {
+
+    public WarTrainedSlasher(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{3}{R}");
+
+        this.subtype.add(SubType.WOLVERINE);
+        this.subtype.add(SubType.DINOSAUR);
+        this.power = new MageInt(4);
+        this.toughness = new MageInt(3);
+
+        // Menace
+        this.addAbility(new MenaceAbility());
+
+        // Whenever War-Trained Slasher attacks a battle, double its power until end of turn.
+        this.addAbility(new WarTrainedSlasherTriggeredAbility());
+    }
+
+    private WarTrainedSlasher(final WarTrainedSlasher card) {
+        super(card);
+    }
+
+    @Override
+    public WarTrainedSlasher copy() {
+        return new WarTrainedSlasher(this);
+    }
+}
+
+class WarTrainedSlasherTriggeredAbility extends TriggeredAbilityImpl {
+
+    WarTrainedSlasherTriggeredAbility() {
+        super(Zone.BATTLEFIELD, new WarTrainedSlasherEffect());
+    }
+
+    private WarTrainedSlasherTriggeredAbility(final WarTrainedSlasherTriggeredAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public WarTrainedSlasherTriggeredAbility copy() {
+        return new WarTrainedSlasherTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.DECLARED_ATTACKERS;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        return Optional
+                .ofNullable(this.getSourceId())
+                .map(game.getCombat()::getDefenderId)
+                .map(game::getPermanent)
+                .filter(Objects::nonNull)
+                .map(permanent -> permanent.isBattle(game))
+                .orElse(false);
+    }
+
+    @Override
+    public String getRule() {
+        return "Whenever {this} attacks a battle, double its power until end of turn.";
+    }
+}
+
+class WarTrainedSlasherEffect extends OneShotEffect {
+
+    WarTrainedSlasherEffect() {
+        super(Outcome.Benefit);
+    }
+
+    private WarTrainedSlasherEffect(final WarTrainedSlasherEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public WarTrainedSlasherEffect copy() {
+        return new WarTrainedSlasherEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Permanent permanent = source.getSourcePermanentIfItStillExists(game);
+        if (permanent == null) {
+            return false;
+        }
+        int power = permanent.getPower().getValue();
+        if (power == 0) {
+            return false;
+        }
+        game.addEffect(new BoostSourceEffect(power, 0, Duration.EndOfTurn), source);
+        return true;
+    }
+}

Mage.Sets/src/mage/sets/MarchOfTheMachine.java

@@ -205,6 +205,7 @@ public final class MarchOfTheMachine extends ExpansionSet {
         cards.add(new SetCardInfo("Vanquish the Weak", 129, Rarity.COMMON, mage.cards.v.VanquishTheWeak.class));
         cards.add(new SetCardInfo("Voldaren Thrillseeker", 171, Rarity.RARE, mage.cards.v.VoldarenThrillseeker.class));
         cards.add(new SetCardInfo("War Historian", 214, Rarity.COMMON, mage.cards.w.WarHistorian.class));
+        cards.add(new SetCardInfo("War-Trained Slasher", 172, Rarity.COMMON, mage.cards.w.WarTrainedSlasher.class));
         cards.add(new SetCardInfo("Wary Thespian", 215, Rarity.COMMON, mage.cards.w.WaryThespian.class));
         cards.add(new SetCardInfo("Wildwood Escort", 216, Rarity.COMMON, mage.cards.w.WildwoodEscort.class));
         cards.add(new SetCardInfo("Wind-Scarred Crag", 276, Rarity.COMMON, mage.cards.w.WindScarredCrag.class));