Implemented Oko, Thief of Crowns

Mage.Sets/src/mage/cards/o/OkoThiefOfCrowns.java

@@ -0,0 +1,89 @@
+package mage.cards.o;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.LoyaltyAbility;
+import mage.abilities.common.PlaneswalkerEntersWithLoyaltyCountersAbility;
+import mage.abilities.effects.common.CreateTokenEffect;
+import mage.abilities.effects.common.continuous.BecomesCreatureTargetEffect;
+import mage.abilities.effects.common.continuous.ExchangeControlTargetEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.FilterPermanent;
+import mage.filter.StaticFilters;
+import mage.filter.common.FilterOpponentsCreaturePermanent;
+import mage.filter.predicate.mageobject.PowerPredicate;
+import mage.game.permanent.token.FoodToken;
+import mage.game.permanent.token.TokenImpl;
+import mage.target.TargetPermanent;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class OkoThiefOfCrowns extends CardImpl {
+
+    private static final FilterPermanent filter = new FilterOpponentsCreaturePermanent("creature an opponent controls with power 3 or less");
+
+    static {
+        filter.add(new PowerPredicate(ComparisonType.FEWER_THAN, 4));
+    }
+
+    public OkoThiefOfCrowns(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.PLANESWALKER}, "{1}{G}{U}");
+
+        this.addSuperType(SuperType.LEGENDARY);
+        this.subtype.add(SubType.OKO);
+        this.addAbility(new PlaneswalkerEntersWithLoyaltyCountersAbility(4));
+
+        // +2: Create a Food token.
+        this.addAbility(new LoyaltyAbility(new CreateTokenEffect(new FoodToken(), 2)));
+
+        // +1: Target artifact or creature loses all abilities and becomes a green Elk creature with base power and toughness 3/3.
+        Ability ability = new LoyaltyAbility(new BecomesCreatureTargetEffect(
+                new OkoThiefOfCrownsToken(), true, false, Duration.Custom
+        ).setText("target artifact or creature loses all abilities and becomes a green Elk creature with base power and toughness 3/3"), 1);
+        ability.addTarget(new TargetPermanent(StaticFilters.FILTER_PERMANENT_ARTIFACT_OR_CREATURE));
+        this.addAbility(ability);
+
+        // −5: Exchange control of target artifact or creature you control and target creature an opponent controls with power 3 or less.
+        ability = new LoyaltyAbility(new ExchangeControlTargetEffect(
+                Duration.EndOfGame, "exchange control of target artifact or creature you control " +
+                "and target creature an opponent controls with power 3 or less", false, true
+        ), -5);
+        ability.addTarget(new TargetPermanent(StaticFilters.FILTER_CONTROLLED_PERMANENT_ARTIFACT_OR_CREATURE));
+        ability.addTarget(new TargetPermanent(filter));
+        this.addAbility(ability);
+    }
+
+    private OkoThiefOfCrowns(final OkoThiefOfCrowns card) {
+        super(card);
+    }
+
+    @Override
+    public OkoThiefOfCrowns copy() {
+        return new OkoThiefOfCrowns(this);
+    }
+}
+
+class OkoThiefOfCrownsToken extends TokenImpl {
+
+    OkoThiefOfCrownsToken() {
+        super("", "green Elk creature with base power and toughness 3/3");
+        cardType.add(CardType.CREATURE);
+        color.setGreen(true);
+        subtype.add(SubType.ELK);
+        power = new MageInt(3);
+        toughness = new MageInt(3);
+    }
+
+    private OkoThiefOfCrownsToken(final OkoThiefOfCrownsToken token) {
+        super(token);
+    }
+
+    public OkoThiefOfCrownsToken copy() {
+        return new OkoThiefOfCrownsToken(this);
+    }
+}

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

@@ -59,6 +59,7 @@ public final class ThroneOfEldraine extends ExpansionSet {
         cards.add(new SetCardInfo("Lovestruck Beast", 165, Rarity.RARE, mage.cards.l.LovestruckBeast.class));
         cards.add(new SetCardInfo("Mace of the Valiant", 314, Rarity.RARE, mage.cards.m.MaceOfTheValiant.class));
         cards.add(new SetCardInfo("Maraleaf Pixie", 196, Rarity.UNCOMMON, mage.cards.m.MaraleafPixie.class));
+        cards.add(new SetCardInfo("Oko, Thief of Crowns", 197, Rarity.MYTHIC, mage.cards.o.OkoThiefOfCrowns.class));
         cards.add(new SetCardInfo("Order of Midnight", 99, Rarity.UNCOMMON, mage.cards.o.OrderOfMidnight.class));
         cards.add(new SetCardInfo("Rankle, Master of Pranks", 101, Rarity.MYTHIC, mage.cards.r.RankleMasterOfPranks.class));
         cards.add(new SetCardInfo("Rosethorn Acolyte", 174, Rarity.COMMON, mage.cards.r.RosethornAcolyte.class));

Mage/src/main/java/mage/constants/SubType.java

@@ -407,6 +407,7 @@ public enum SubType {
     NISSA("Nissa", SubTypeSet.PlaneswalkerType),
     NIXILIS("Nixilis", SubTypeSet.PlaneswalkerType),
     OBI_WAN("Obi-Wan", SubTypeSet.PlaneswalkerType, true), // Star Wars
+    OKO("Oko", SubTypeSet.PlaneswalkerType),
     RAL("Ral", SubTypeSet.PlaneswalkerType),
     ROWAN("Rowan", SubTypeSet.PlaneswalkerType),
     SAHEELI("Saheeli", SubTypeSet.PlaneswalkerType),