[WOE] Implement Rowan, Scion of War (#10853)

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

Mage.Sets/src/mage/cards/r/RowanScionOfWar.java

@@ -0,0 +1,93 @@
+package mage.cards.r;
+
+import mage.MageInt;
+import mage.ObjectColor;
+import mage.abilities.Ability;
+import mage.abilities.SpellAbility;
+import mage.abilities.common.ActivateAsSorceryActivatedAbility;
+import mage.abilities.costs.common.TapSourceCost;
+import mage.abilities.dynamicvalue.common.ControllerLostLifeCount;
+import mage.abilities.effects.common.cost.CostModificationEffectImpl;
+import mage.abilities.keyword.MenaceAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.game.Game;
+import mage.util.CardUtil;
+import mage.watchers.common.PlayerLostLifeWatcher;
+
+import java.util.UUID;
+
+/**
+ * @author Susucr
+ */
+public final class RowanScionOfWar extends CardImpl {
+
+    public RowanScionOfWar(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{1}{B}{R}");
+
+        this.supertype.add(SuperType.LEGENDARY);
+        this.subtype.add(SubType.HUMAN);
+        this.subtype.add(SubType.WIZARD);
+        this.power = new MageInt(4);
+        this.toughness = new MageInt(2);
+
+        // Menace
+        this.addAbility(new MenaceAbility(false));
+
+        // {T}: Spells you cast this turn that are black and/or red cost {X} less to cast, where X is the amount of life you lost this turn. Activate only as a sorcery.
+        this.addAbility(
+                new ActivateAsSorceryActivatedAbility(
+                        new RowanScionOfWarEffect(),
+                        new TapSourceCost()
+                ).addHint(ControllerLostLifeCount.getHint()),
+                new PlayerLostLifeWatcher()
+        );
+
+    }
+
+    private RowanScionOfWar(final RowanScionOfWar card) {
+        super(card);
+    }
+
+    @Override
+    public RowanScionOfWar copy() {
+        return new RowanScionOfWar(this);
+    }
+}
+
+class RowanScionOfWarEffect extends CostModificationEffectImpl {
+
+    RowanScionOfWarEffect() {
+        super(Duration.EndOfTurn, Outcome.Benefit, CostModificationType.REDUCE_COST);
+        staticText = "Spells you cast this turn that are black and/or red cost {X} less to cast, where X is the amount of life you lost this turn.";
+    }
+
+    private RowanScionOfWarEffect(final RowanScionOfWarEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source, Ability abilityToModify) {
+        CardUtil.reduceCost(abilityToModify, Math.max(0, ControllerLostLifeCount.instance.calculate(game, source, this)));
+        return true;
+    }
+
+    @Override
+    public boolean applies(Ability abilityToModify, Ability source, Game game) {
+        if (!(abilityToModify instanceof SpellAbility)) {
+            return false;
+        }
+        SpellAbility spell = (SpellAbility) abilityToModify;
+        ObjectColor color = spell.getCharacteristics(game).getColor(game);
+
+        return spell.isControlledBy(source.getControllerId())
+                && game.getCard(spell.getSourceId()) != null
+                && (color.isRed() || color.isBlack());
+    }
+
+    @Override
+    public RowanScionOfWarEffect copy() {
+        return new RowanScionOfWarEffect(this);
+    }
+}

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

@@ -76,6 +76,7 @@ public final class WildsOfEldraine extends ExpansionSet {
         cards.add(new SetCardInfo("Restless Spire", 306, Rarity.RARE, mage.cards.r.RestlessSpire.class));
         cards.add(new SetCardInfo("Return from the Wilds", 181, Rarity.COMMON, mage.cards.r.ReturnFromTheWilds.class));
         cards.add(new SetCardInfo("Rootrider Faun", 182, Rarity.COMMON, mage.cards.r.RootriderFaun.class));
+        cards.add(new SetCardInfo("Rowan, Scion of War", 211, Rarity.MYTHIC, mage.cards.r.RowanScionOfWar.class));
         cards.add(new SetCardInfo("Rowan's Grim Search", 104, Rarity.COMMON, mage.cards.r.RowansGrimSearch.class));
         cards.add(new SetCardInfo("Ruby, Daring Tracker", 212, Rarity.UNCOMMON, mage.cards.r.RubyDaringTracker.class));
         cards.add(new SetCardInfo("Scalding Viper", 235, Rarity.RARE, mage.cards.s.ScaldingViper.class));

Mage/src/main/java/mage/abilities/SpellAbility.java

@@ -286,7 +286,7 @@ public class SpellAbility extends ActivatedAbilityImpl {
     }
 
     /**
-     * Returns a card object with the spell characteristics like calor, types,
+     * Returns a card object with the spell characteristics like color, types,
      * subtypes etc. E.g. if you cast a Bestow card as enchantment, the
      * characteristics don't include the creature type.
      *

Mage/src/main/java/mage/abilities/dynamicvalue/common/ControllerLostLifeCount.java

@@ -0,0 +1,48 @@
+package mage.abilities.dynamicvalue.common;
+
+import mage.abilities.Ability;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.effects.Effect;
+import mage.abilities.hint.Hint;
+import mage.abilities.hint.ValueHint;
+import mage.game.Game;
+import mage.watchers.common.PlayerLostLifeWatcher;
+
+/**
+ * Amount of life the controller lost this turn.
+ *
+ * @author Susucr
+ */
+public enum ControllerLostLifeCount implements DynamicValue {
+    instance;
+
+    private static final Hint hint = new ValueHint("Life lost this turn", instance);
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility, Effect effect) {
+        PlayerLostLifeWatcher watcher = game.getState().getWatcher(PlayerLostLifeWatcher.class);
+        if (watcher != null) {
+            return watcher.getLifeLost(sourceAbility.getControllerId());
+        }
+        return 0;
+    }
+
+    @Override
+    public ControllerLostLifeCount copy() {
+        return instance;
+    }
+
+    @Override
+    public String toString() {
+        return "X";
+    }
+
+    @Override
+    public String getMessage() {
+        return "the amount of life you lost this turn";
+    }
+
+    public static Hint getHint() {
+        return hint;
+    }
+}