[DMC] Implemented Historian's Boon

Mage.Sets/src/mage/cards/h/HistoriansBoon.java

@@ -0,0 +1,102 @@
+package mage.cards.h;
+
+import mage.abilities.Ability;
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.common.EntersBattlefieldThisOrAnotherTriggeredAbility;
+import mage.abilities.common.SagaAbility;
+import mage.abilities.effects.common.CreateTokenEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SagaChapter;
+import mage.constants.SubType;
+import mage.constants.Zone;
+import mage.filter.FilterPermanent;
+import mage.filter.common.FilterControlledEnchantmentPermanent;
+import mage.filter.predicate.permanent.TokenPredicate;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.game.permanent.token.AngelVigilanceToken;
+import mage.game.permanent.token.SoldierToken;
+import mage.util.CardUtil;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class HistoriansBoon extends CardImpl {
+
+    private static final FilterPermanent filter
+            = new FilterControlledEnchantmentPermanent("another nontoken enchantment");
+
+    static {
+        filter.add(TokenPredicate.FALSE);
+    }
+
+    public HistoriansBoon(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{3}{W}");
+
+        // Whenever Historian's Boon or another nontoken enchantment enters the battlefield under your control, create a 1/1 white Soldier creature token.
+        this.addAbility(new EntersBattlefieldThisOrAnotherTriggeredAbility(
+                new CreateTokenEffect(new SoldierToken()), filter, false, true
+        ));
+
+        // Whenever the final chapter of a Saga you control triggers, create a 4/4 white Angel creature token with flying and vigilance.
+        this.addAbility(new HistoriansBoonTriggeredAbility());
+    }
+
+    private HistoriansBoon(final HistoriansBoon card) {
+        super(card);
+    }
+
+    @Override
+    public HistoriansBoon copy() {
+        return new HistoriansBoon(this);
+    }
+}
+
+class HistoriansBoonTriggeredAbility extends TriggeredAbilityImpl {
+
+    HistoriansBoonTriggeredAbility() {
+        super(Zone.BATTLEFIELD, new CreateTokenEffect(new AngelVigilanceToken()));
+    }
+
+    private HistoriansBoonTriggeredAbility(final HistoriansBoonTriggeredAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public HistoriansBoonTriggeredAbility copy() {
+        return new HistoriansBoonTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.ABILITY_TRIGGERED;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        Permanent permanent = game.getPermanent(event.getSourceId());
+        if (permanent == null
+                || !permanent.isControlledBy(getControllerId())
+                || !permanent.hasSubtype(SubType.SAGA, game)) {
+            return false;
+        }
+        int maxChapter = CardUtil
+                .castStream(permanent.getAbilities(game).stream(), SagaAbility.class)
+                .map(SagaAbility::getMaxChapter)
+                .mapToInt(SagaChapter::getNumber)
+                .sum();
+        Ability ability = game.getAbility(event.getTargetId(), event.getSourceId()).orElse(null);
+        return SagaAbility.isFinalAbility(ability, maxChapter);
+    }
+
+    @Override
+    public String getRule() {
+        return "Whenever the final chapter of a Saga you control triggers, " +
+                "create a 4/4 white Angel creature token with flying and vigilance.";
+    }
+}

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

@@ -99,6 +99,7 @@ public final class DominariaUnitedCommander extends ExpansionSet {
         cards.add(new SetCardInfo("Hero's Blade", 186, Rarity.UNCOMMON, mage.cards.h.HerosBlade.class));
         cards.add(new SetCardInfo("Hero's Downfall", 112, Rarity.UNCOMMON, mage.cards.h.HerosDownfall.class));
         cards.add(new SetCardInfo("Heroes' Podium", 185, Rarity.RARE, mage.cards.h.HeroesPodium.class));
+        cards.add(new SetCardInfo("Historian's Boon", 21, Rarity.RARE, mage.cards.h.HistoriansBoon.class));
         cards.add(new SetCardInfo("Honor-Worn Shaku", 187, Rarity.UNCOMMON, mage.cards.h.HonorWornShaku.class));
         cards.add(new SetCardInfo("Illuna, Apex of Wishes", 154, Rarity.MYTHIC, mage.cards.i.IllunaApexOfWishes.class));
         cards.add(new SetCardInfo("Iridian Maelstrom", 12, Rarity.RARE, mage.cards.i.IridianMaelstrom.class));

Mage/src/main/java/mage/abilities/common/SagaAbility.java

@@ -139,6 +139,11 @@ public class SagaAbility extends SimpleStaticAbility {
     public static boolean isChapterAbility(TriggeredAbility ability) {
         return ability instanceof ChapterTriggeredAbility;
     }
+
+    public static boolean isFinalAbility(Ability ability, int maxChapter) {
+        return ability instanceof ChapterTriggeredAbility
+                && ((ChapterTriggeredAbility) ability).getChapterFrom().getNumber() == maxChapter;
+    }
 }
 
 class SagaLoreCountersEffect extends OneShotEffect {