Implemented The Akroan War

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

@@ -0,0 +1,103 @@
+package mage.cards.t;
+
+import mage.abilities.Ability;
+import mage.abilities.common.SagaAbility;
+import mage.abilities.condition.common.SourceOnBattlefieldCondition;
+import mage.abilities.decorator.ConditionalContinuousEffect;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.combat.AttacksIfAbleAllEffect;
+import mage.abilities.effects.common.continuous.GainControlTargetEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.FilterPermanent;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.filter.common.FilterOpponentsCreaturePermanent;
+import mage.filter.predicate.permanent.TappedPredicate;
+import mage.game.Game;
+import mage.target.common.TargetCreaturePermanent;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class TheAkroanWar extends CardImpl {
+
+    private static final FilterCreaturePermanent filter
+            = new FilterOpponentsCreaturePermanent("creatures your opponents control");
+
+    public TheAkroanWar(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{3}{R}");
+
+        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 — Gain control of target creature for as long as The Akroan War remains on the battlefield.
+        sagaAbility.addChapterEffect(
+                this,
+                SagaChapter.CHAPTER_I,
+                SagaChapter.CHAPTER_I,
+                new ConditionalContinuousEffect(
+                        new GainControlTargetEffect(Duration.Custom, true),
+                        SourceOnBattlefieldCondition.instance, "gain control of target creature " +
+                        "for as long as {this} remains on the battlefield"
+                ), new TargetCreaturePermanent()
+        );
+
+        // II — Until your next turn, creatures your opponents control attack each combat if able.
+        sagaAbility.addChapterEffect(
+                this,
+                SagaChapter.CHAPTER_II,
+                new AttacksIfAbleAllEffect(
+                        filter, Duration.UntilYourNextTurn, true
+                )
+        );
+
+        // III — Each tapped creature deals damage to itself equal to its power.
+        sagaAbility.addChapterEffect(this, SagaChapter.CHAPTER_III, new TheAkroanWarEffect());
+    }
+
+    private TheAkroanWar(final TheAkroanWar card) {
+        super(card);
+    }
+
+    @Override
+    public TheAkroanWar copy() {
+        return new TheAkroanWar(this);
+    }
+}
+
+class TheAkroanWarEffect extends OneShotEffect {
+
+    private static final FilterPermanent filter = new FilterCreaturePermanent();
+
+    static {
+        filter.add(TappedPredicate.instance);
+    }
+
+    TheAkroanWarEffect() {
+        super(Outcome.Benefit);
+        staticText = "each tapped creature deals damage to itself equal to its power";
+    }
+
+    private TheAkroanWarEffect(final TheAkroanWarEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public TheAkroanWarEffect copy() {
+        return new TheAkroanWarEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        game.getBattlefield()
+                .getActivePermanents(filter, source.getControllerId(), game)
+                .stream()
+                .forEach(permanent -> permanent.damage(permanent.getPower().getValue(), permanent.getId(), game));
+        return true;
+    }
+}

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

@@ -49,5 +49,6 @@ public final class TherosBeyondDeath extends ExpansionSet {
         cards.add(new SetCardInfo("Setessan Champion", 198, Rarity.RARE, mage.cards.s.SetessanChampion.class));
         cards.add(new SetCardInfo("Staggering Insight", 228, Rarity.UNCOMMON, mage.cards.s.StaggeringInsight.class));
         cards.add(new SetCardInfo("Swamp", 252, Rarity.LAND, mage.cards.basiclands.Swamp.class, FULL_ART_BFZ_VARIOUS));
+        cards.add(new SetCardInfo("The Akroan War", 124, Rarity.RARE, mage.cards.t.TheAkroanWar.class));
     }
 }