[KHM] Implemented The Three Seasons (#7424)

Co-authored-by: Evan Kranzler <theelk801@gmail.com>

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

@@ -0,0 +1,162 @@
+package mage.cards.t;
+
+import java.util.*;
+
+import mage.abilities.Ability;
+import mage.abilities.common.SagaAbility;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.MillCardsControllerEffect;
+import mage.abilities.effects.common.ReturnFromGraveyardToHandTargetEffect;
+import mage.cards.*;
+import mage.constants.*;
+import mage.filter.FilterCard;
+import mage.filter.common.FilterPermanentCard;
+import mage.game.Game;
+import mage.game.events.TargetEvent;
+import mage.players.Player;
+import mage.target.TargetCard;
+import mage.target.common.TargetCardInYourGraveyard;
+
+/**
+ *
+ * @author weirddan455
+ */
+public final class TheThreeSeasons extends CardImpl {
+
+    private static final FilterPermanentCard filter
+            = new FilterPermanentCard("snow permanent cards from your graveyard");
+
+    static {
+        filter.add(SuperType.SNOW.getPredicate());
+    }
+
+    public TheThreeSeasons(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{G}{U}");
+
+        this.subtype.add(SubType.SAGA);
+
+        // (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
+        SagaAbility sagaAbility = new SagaAbility(this, SagaChapter.CHAPTER_III);
+
+        // I — Mill three cards.
+        sagaAbility.addChapterEffect(this, SagaChapter.CHAPTER_I, new MillCardsControllerEffect(3));
+
+        // II — Return up to two target snow permanent cards from your graveyard to your hand.
+        sagaAbility.addChapterEffect(this, SagaChapter.CHAPTER_II, SagaChapter.CHAPTER_II,
+                new ReturnFromGraveyardToHandTargetEffect(), new TargetCardInYourGraveyard(0, 2, filter)
+        );
+
+        // III — Choose up to three cards in each graveyard. Their owners shuffle those cards into their libraries.
+        sagaAbility.addChapterEffect(this, SagaChapter.CHAPTER_III, new TheThreeSeasonsEffect());
+        this.addAbility(sagaAbility);
+    }
+
+    private TheThreeSeasons(final TheThreeSeasons card) {
+        super(card);
+    }
+
+    @Override
+    public TheThreeSeasons copy() {
+        return new TheThreeSeasons(this);
+    }
+}
+
+class TheThreeSeasonsEffect extends OneShotEffect {
+
+    public TheThreeSeasonsEffect() {
+        super(Outcome.Neutral);
+        staticText = "Choose up to three cards in each graveyard. Their owners shuffle those cards into their libraries";
+    }
+
+    private TheThreeSeasonsEffect (final TheThreeSeasonsEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public TheThreeSeasonsEffect copy() {
+        return new TheThreeSeasonsEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player controller = game.getPlayer(source.getControllerId());
+        if (controller != null) {
+            Map<Player, Cards> playerCardsMap = new LinkedHashMap<>();
+            for (UUID playerId : game.getState().getPlayersInRange(controller.getId(), game)) {
+                Player player = game.getPlayer(playerId);
+                if (player != null) {
+                    TheThreeSeasonsTarget target = new TheThreeSeasonsTarget(player);
+                    controller.chooseTarget(outcome, target, source, game);
+                    playerCardsMap.put(player, new CardsImpl(target.getTargets()));
+                }
+            }
+            for (Map.Entry<Player, Cards> entry : playerCardsMap.entrySet()) {
+                entry.getKey().shuffleCardsToLibrary(entry.getValue(), game, source);
+            }
+            return true;
+        }
+        return false;
+    }
+}
+
+class TheThreeSeasonsTarget extends TargetCard {
+
+    private final Player player;
+
+    public TheThreeSeasonsTarget(Player player) {
+        super(0, 3, Zone.GRAVEYARD, new FilterCard(
+                "cards in " + player.getLogName() + "'s graveyard"
+        ));
+        this.setNotTarget(true);
+        this.player = player;
+    }
+
+    private TheThreeSeasonsTarget(final TheThreeSeasonsTarget target) {
+        super(target);
+        this.player = target.player;
+    }
+
+    @Override
+    public TheThreeSeasonsTarget copy() {
+        return new TheThreeSeasonsTarget(this);
+    }
+
+    @Override
+    public boolean canTarget(UUID id, Game game) {
+        Card card = game.getCard(id);
+        return card != null && game.getState().getZone(card.getId()) == Zone.GRAVEYARD
+                && player.getGraveyard().contains(id) && filter.match(card, game);
+    }
+
+    @Override
+    public boolean canTarget(UUID id, Ability source, Game game) {
+        return this.canTarget(id, game);
+    }
+
+    @Override
+    public boolean canTarget(UUID playerId, UUID id, Ability source, Game game) {
+        return this.canTarget(id, game);
+    }
+
+    @Override
+    public Set<UUID> possibleTargets(UUID sourceId, UUID sourceControllerId, Game game) {
+        Set<UUID> possibleTargets = new HashSet<>();
+        for (Card card : player.getGraveyard().getCards(filter, game)) {
+            if (sourceId == null || isNotTarget() || !game.replaceEvent(new TargetEvent(card, sourceId, sourceControllerId))) {
+                possibleTargets.add(card.getId());
+            }
+        }
+        return possibleTargets;
+    }
+
+    @Override
+    public Set<UUID> possibleTargets(UUID sourceControllerId, Cards cards, Game game) {
+        Set<UUID> possibleTargets = new HashSet<>();
+        for (Card card : cards.getCards(filter, game)) {
+            if (player.getGraveyard().getCards(game).contains(card)) {
+                possibleTargets.add(card.getId());
+            }
+        }
+        return possibleTargets;
+    }
+}

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

@@ -287,6 +287,7 @@ public final class Kaldheim extends ExpansionSet {
         cards.add(new SetCardInfo("Tergrid, God of Fright", 112, Rarity.RARE, mage.cards.t.TergridGodOfFright.class));
         cards.add(new SetCardInfo("The Bears of Littjara", 205, Rarity.RARE, mage.cards.t.TheBearsOfLittjara.class));
         cards.add(new SetCardInfo("The Bloodsky Massacre", 207, Rarity.RARE, mage.cards.t.TheBloodskyMassacre.class));
+        cards.add(new SetCardInfo("The Three Seasons", 231, Rarity.UNCOMMON, mage.cards.t.TheThreeSeasons.class));
         cards.add(new SetCardInfo("The Raven's Warning", 227, Rarity.RARE, mage.cards.t.TheRavensWarning.class));
         cards.add(new SetCardInfo("The Trickster-God's Heist", 232, Rarity.UNCOMMON, mage.cards.t.TheTricksterGodsHeist.class));
         cards.add(new SetCardInfo("The World Tree", 275, Rarity.RARE, mage.cards.t.TheWorldTree.class));