[MKM] Implement Case of the Uneaten Feast (#11731)

---------

Co-authored-by: Matthew Wilson <matthew_w@vaadin.com>

Mage.Sets/src/mage/cards/c/CaseOfTheUneatenFeast.java

@@ -0,0 +1,150 @@
+package mage.cards.c;
+
+import java.util.Objects;
+import java.util.UUID;
+
+import mage.MageObjectReference;
+import mage.abilities.Ability;
+import mage.abilities.common.CaseAbility;
+import mage.abilities.common.EntersBattlefieldControlledTriggeredAbility;
+import mage.abilities.common.MayCastFromGraveyardSourceAbility;
+import mage.abilities.condition.Condition;
+import mage.abilities.condition.common.SolvedSourceCondition;
+import mage.abilities.condition.common.YouGainedLifeCondition;
+import mage.abilities.costs.common.SacrificeSourceCost;
+import mage.abilities.decorator.ConditionalActivatedAbility;
+import mage.abilities.effects.ContinuousEffectImpl;
+import mage.abilities.effects.common.GainLifeEffect;
+import mage.abilities.hint.common.CaseSolvedHint;
+import mage.cards.Card;
+import mage.constants.ComparisonType;
+import mage.constants.Duration;
+import mage.constants.Layer;
+import mage.constants.Outcome;
+import mage.constants.SubLayer;
+import mage.constants.SubType;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.filter.StaticFilters;
+import mage.game.Game;
+import mage.players.Player;
+import mage.watchers.common.PlayerGainedLifeWatcher;
+
+/**
+ *
+ * @author DominionSpy
+ */
+public final class CaseOfTheUneatenFeast extends CardImpl {
+
+    private static final Condition condition = new YouGainedLifeCondition(ComparisonType.MORE_THAN, 4);
+
+    public CaseOfTheUneatenFeast(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{W}");
+
+        this.subtype.add(SubType.CASE);
+
+        // Whenever a creature enters the battlefield under your control, you gain 1 life.
+        Ability initialAbility = new EntersBattlefieldControlledTriggeredAbility(
+                new GainLifeEffect(1), StaticFilters.FILTER_PERMANENT_CREATURE);
+        // To solve -- You've gained 5 or more life this turn.
+        // Solved -- Sacrifice this Case: Creature cards in your graveyard gain "You may cast this card from your graveyard" until end of turn.
+        Ability solvedAbility = new ConditionalActivatedAbility(
+                new CaseOfTheUneatenFeastEffect(),
+                new SacrificeSourceCost().setText("sacrifice this Case"),
+                SolvedSourceCondition.SOLVED);
+
+        this.addAbility(new CaseAbility(initialAbility, condition, solvedAbility)
+                .addHint(new CaseOfTheUneatenFeastHint(condition)),
+                new PlayerGainedLifeWatcher());
+    }
+
+    private CaseOfTheUneatenFeast(final CaseOfTheUneatenFeast card) {
+        super(card);
+    }
+
+    @Override
+    public CaseOfTheUneatenFeast copy() {
+        return new CaseOfTheUneatenFeast(this);
+    }
+}
+
+class CaseOfTheUneatenFeastEffect extends ContinuousEffectImpl {
+
+    CaseOfTheUneatenFeastEffect() {
+        super(Duration.EndOfTurn, Layer.AbilityAddingRemovingEffects_6, SubLayer.NA, Outcome.AddAbility);
+        this.staticText = "Creature cards in your graveyard gain \"You may cast this card from your graveyard\" until end of turn";
+    }
+
+    private CaseOfTheUneatenFeastEffect(final CaseOfTheUneatenFeastEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public CaseOfTheUneatenFeastEffect copy() {
+        return new CaseOfTheUneatenFeastEffect(this);
+    }
+
+    @Override
+    public void init(Ability source, Game game) {
+        super.init(source, game);
+        if (!this.affectedObjectsSet) {
+            return;
+        }
+        Player player = game.getPlayer(source.getControllerId());
+        if (player == null) {
+            return;
+        }
+        player.getGraveyard()
+                .stream()
+                .map(game::getCard)
+                .filter(Objects::nonNull)
+                .filter(card -> card.isCreature(game))
+                .forEach(card -> affectedObjectList.add(new MageObjectReference(card, game)));
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        if (player == null) {
+            return false;
+        }
+        player.getGraveyard()
+                .stream()
+                .filter(cardId -> affectedObjectList.contains(new MageObjectReference(cardId, game)))
+                .forEach(cardId -> {
+                    Card card = game.getCard(cardId);
+                    if (card == null) {
+                        return;
+                    }
+                    MayCastFromGraveyardSourceAbility ability = new MayCastFromGraveyardSourceAbility();
+                    ability.setSourceId(cardId);
+                    ability.setControllerId(card.getOwnerId());
+                    game.getState().addOtherAbility(card, ability);
+                });
+        return true;
+    }
+}
+
+class CaseOfTheUneatenFeastHint extends CaseSolvedHint {
+
+    CaseOfTheUneatenFeastHint(Condition condition) {
+        super(condition);
+    }
+
+    private CaseOfTheUneatenFeastHint(final CaseOfTheUneatenFeastHint hint) {
+        super(hint);
+    }
+
+    @Override
+    public CaseOfTheUneatenFeastHint copy() {
+        return new CaseOfTheUneatenFeastHint(this);
+    }
+
+    @Override
+    public String getConditionText(Game game, Ability ability) {
+        int lifeGained = game.getState().getWatcher(PlayerGainedLifeWatcher.class)
+                .getLifeGained(ability.getControllerId());
+        return "Life gained: " + lifeGained + " (need 5).";
+    }
+}

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

@@ -58,6 +58,7 @@ public final class MurdersAtKarlovManor extends ExpansionSet {
         cards.add(new SetCardInfo("Case of the Shattered Pact", 1, Rarity.UNCOMMON, mage.cards.c.CaseOfTheShatteredPact.class));
         cards.add(new SetCardInfo("Case of the Stashed Skeleton", 80, Rarity.RARE, mage.cards.c.CaseOfTheStashedSkeleton.class));
         cards.add(new SetCardInfo("Case of the Trampled Garden", 156, Rarity.UNCOMMON, mage.cards.c.CaseOfTheTrampledGarden.class));
+        cards.add(new SetCardInfo("Case of the Uneaten Feast", 10, Rarity.RARE, mage.cards.c.CaseOfTheUneatenFeast.class));
         cards.add(new SetCardInfo("Caught Red-Handed", 115, Rarity.UNCOMMON, mage.cards.c.CaughtRedHanded.class));
         cards.add(new SetCardInfo("Cease // Desist", 246, Rarity.UNCOMMON, mage.cards.c.CeaseDesist.class));
         cards.add(new SetCardInfo("Cerebral Confiscation", 81, Rarity.COMMON, mage.cards.c.CerebralConfiscation.class));