Implemented The Great Henge

Mage.Sets/src/mage/cards/t/TheGreatHenge.java

@@ -0,0 +1,110 @@
+package mage.cards.t;
+
+import mage.MageInt;
+import mage.Mana;
+import mage.abilities.Ability;
+import mage.abilities.SpellAbility;
+import mage.abilities.common.EntersBattlefieldControlledTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.costs.common.TapSourceCost;
+import mage.abilities.effects.common.DrawCardSourceControllerEffect;
+import mage.abilities.effects.common.GainLifeEffect;
+import mage.abilities.effects.common.cost.CostModificationEffectImpl;
+import mage.abilities.effects.common.counter.AddCountersTargetEffect;
+import mage.abilities.mana.SimpleManaAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.counters.CounterType;
+import mage.filter.FilterPermanent;
+import mage.filter.StaticFilters;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.filter.predicate.Predicates;
+import mage.filter.predicate.permanent.TokenPredicate;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.util.CardUtil;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class TheGreatHenge extends CardImpl {
+
+    private static final FilterPermanent filter = new FilterCreaturePermanent();
+
+    static {
+        filter.add(Predicates.not(TokenPredicate.instance));
+    }
+
+    public TheGreatHenge(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ARTIFACT}, "{7}{G}{G}");
+
+        this.addSuperType(SuperType.LEGENDARY);
+
+        // This spell costs {X} less to cast, where X is the greatest power among creatures you control.
+        this.addAbility(new SimpleStaticAbility(Zone.ALL, new TheGreatHengeCostReductionEffect()));
+
+        // {T}: Add {G}{G}. You gain 2 life.
+        Ability ability = new SimpleManaAbility(Zone.BATTLEFIELD, Mana.GreenMana(2), new TapSourceCost());
+        ability.addEffect(new GainLifeEffect(2).setText("You gain 2 life."));
+        this.addAbility(ability);
+
+        // Whenever a nontoken creature enters the battlefield under your control, put a +1/+1 counter on it and draw a card.
+        ability = new EntersBattlefieldControlledTriggeredAbility(
+                Zone.BATTLEFIELD, new AddCountersTargetEffect(CounterType.P1P1.createInstance()),
+                filter, false, SetTargetPointer.PERMANENT, "Whenever a nontoken creature " +
+                "enters the battlefield under your control, put a +1/+1 counter on it and draw a card."
+        );
+        ability.addEffect(new DrawCardSourceControllerEffect(1));
+        this.addAbility(ability);
+    }
+
+    private TheGreatHenge(final TheGreatHenge card) {
+        super(card);
+    }
+
+    @Override
+    public TheGreatHenge copy() {
+        return new TheGreatHenge(this);
+    }
+}
+
+class TheGreatHengeCostReductionEffect extends CostModificationEffectImpl {
+
+    TheGreatHengeCostReductionEffect() {
+        super(Duration.WhileOnStack, Outcome.Benefit, CostModificationType.REDUCE_COST);
+        staticText = "This spell costs {X} less to cast, where X is the greatest power among creatures you control";
+    }
+
+    private TheGreatHengeCostReductionEffect(final TheGreatHengeCostReductionEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source, Ability abilityToModify) {
+        int reductionAmount = game.getBattlefield()
+                .getAllActivePermanents(
+                        StaticFilters.FILTER_PERMANENT_CREATURE, source.getControllerId(), game
+                ).stream()
+                .map(Permanent::getPower)
+                .mapToInt(MageInt::getValue)
+                .max()
+                .getAsInt();
+        CardUtil.reduceCost(abilityToModify, reductionAmount);
+        return true;
+    }
+
+    @Override
+    public boolean applies(Ability abilityToModify, Ability source, Game game) {
+        return abilityToModify instanceof SpellAbility
+                && abilityToModify.getSourceId().equals(source.getSourceId())
+                && game.getCard(abilityToModify.getSourceId()) != null;
+    }
+
+    @Override
+    public TheGreatHengeCostReductionEffect copy() {
+        return new TheGreatHengeCostReductionEffect(this);
+    }
+}

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

@@ -215,6 +215,7 @@ public final class ThroneOfEldraine extends ExpansionSet {
         cards.add(new SetCardInfo("Taste of Death", 320, Rarity.RARE, mage.cards.t.TasteOfDeath.class));
         cards.add(new SetCardInfo("Tempting Witch", 108, Rarity.COMMON, mage.cards.t.TemptingWitch.class));
         cards.add(new SetCardInfo("The Circle of Loyalty", 9, Rarity.MYTHIC, mage.cards.t.TheCircleOfLoyalty.class));
+        cards.add(new SetCardInfo("The Great Henge", 161, Rarity.MYTHIC, mage.cards.t.TheGreatHenge.class));
         cards.add(new SetCardInfo("The Magic Mirror", 51, Rarity.MYTHIC, mage.cards.t.TheMagicMirror.class));
         cards.add(new SetCardInfo("The Royal Scions", 199, Rarity.MYTHIC, mage.cards.t.TheRoyalScions.class));
         cards.add(new SetCardInfo("Thorn Mammoth", 323, Rarity.RARE, mage.cards.t.ThornMammoth.class));

Mage/src/main/java/mage/abilities/effects/common/cost/SourceCostReductionForEachCardInGraveyardEffect.java

@@ -1,4 +1,3 @@
-
 package mage.abilities.effects.common.cost;
 
 import mage.abilities.Ability;
@@ -7,12 +6,12 @@ import mage.constants.CostModificationType;
 import mage.constants.Duration;
 import mage.constants.Outcome;
 import mage.filter.FilterCard;
+import mage.filter.StaticFilters;
 import mage.game.Game;
 import mage.players.Player;
 import mage.util.CardUtil;
 
 /**
- *
  * @author Styxo
  */
 public class SourceCostReductionForEachCardInGraveyardEffect extends CostModificationEffectImpl {
@@ -20,7 +19,7 @@ public class SourceCostReductionForEachCardInGraveyardEffect extends CostModific
     private FilterCard filter;
 
     public SourceCostReductionForEachCardInGraveyardEffect() {
-        this(new FilterCard());
+        this(StaticFilters.FILTER_CARD);
     }
 
     public SourceCostReductionForEachCardInGraveyardEffect(FilterCard filter) {
@@ -29,7 +28,7 @@ public class SourceCostReductionForEachCardInGraveyardEffect extends CostModific
         staticText = "{this} costs {1} less to cast for each " + filter.getMessage() + " in your graveyard";
     }
 
-    SourceCostReductionForEachCardInGraveyardEffect(SourceCostReductionForEachCardInGraveyardEffect effect) {
+    private SourceCostReductionForEachCardInGraveyardEffect(SourceCostReductionForEachCardInGraveyardEffect effect) {
         super(effect);
         this.filter = effect.filter.copy();
     }