Implemented Greven, Predator Captain

Mage.Sets/src/mage/cards/g/GrevenPredatorCaptain.java

@@ -0,0 +1,131 @@
+package mage.cards.g;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.AttacksTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.dynamicvalue.common.StaticValue;
+import mage.abilities.effects.Effect;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.continuous.BoostSourceEffect;
+import mage.abilities.keyword.MenaceAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.StaticFilters;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+import mage.target.TargetPermanent;
+import mage.watchers.common.PlayerLostLifeWatcher;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class GrevenPredatorCaptain extends CardImpl {
+
+    public GrevenPredatorCaptain(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{3}{B}{R}");
+
+        this.addSuperType(SuperType.LEGENDARY);
+        this.subtype.add(SubType.HUMAN);
+        this.subtype.add(SubType.WARRIOR);
+        this.power = new MageInt(5);
+        this.toughness = new MageInt(5);
+
+        // Menace
+        this.addAbility(new MenaceAbility());
+
+        // Greven, Predator Captain gets +X/+0, where X is the amount of life you've lost this turn.
+        this.addAbility(new SimpleStaticAbility(new BoostSourceEffect(
+                GrevenPredatorCaptainValue.instance, StaticValue.getZeroValue(), Duration.WhileOnBattlefield
+        )));
+
+        // Whenever Greven attacks, you may sacrifice another creature. If you do, you draw cards equal to that creature's power and you lose life equal to that creature's toughness.
+        this.addAbility(new AttacksTriggeredAbility(new GrevenPredatorCaptainEffect(), true));
+    }
+
+    private GrevenPredatorCaptain(final GrevenPredatorCaptain card) {
+        super(card);
+    }
+
+    @Override
+    public GrevenPredatorCaptain copy() {
+        return new GrevenPredatorCaptain(this);
+    }
+}
+
+enum GrevenPredatorCaptainValue implements DynamicValue {
+    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 GrevenPredatorCaptainValue copy() {
+        return instance;
+    }
+
+    @Override
+    public String toString() {
+        return "X";
+    }
+
+    @Override
+    public String getMessage() {
+        return "life you've lost this turn";
+    }
+}
+
+class GrevenPredatorCaptainEffect extends OneShotEffect {
+
+    GrevenPredatorCaptainEffect() {
+        super(Outcome.Benefit);
+        staticText = "sacrifice another creature. If you do, you draw cards equal to " +
+                "that creature's power and you lose life equal to that creature's toughness.";
+    }
+
+    private GrevenPredatorCaptainEffect(final GrevenPredatorCaptainEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public GrevenPredatorCaptainEffect copy() {
+        return new GrevenPredatorCaptainEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        if (player == null) {
+            return false;
+        }
+        TargetPermanent target = new TargetPermanent(
+                0, 1, StaticFilters.FILTER_CONTROLLED_ANOTHER_CREATURE, true
+        );
+        if (!player.choose(outcome, target, source.getSourceId(), game)) {
+            return false;
+        }
+        Permanent permanent = game.getPermanent(target.getFirstTarget());
+        if (permanent == null) {
+            return false;
+        }
+        int power = permanent.getPower().getValue();
+        int toughness = permanent.getToughness().getValue();
+        if (!permanent.sacrifice(source.getSourceId(), game)) {
+            return false;
+        }
+        player.drawCards(power, game);
+        player.loseLife(toughness, game, false);
+        return true;
+    }
+}

Mage.Sets/src/mage/sets/Commander2019Edition.java

@@ -90,6 +90,7 @@ public final class Commander2019Edition extends ExpansionSet {
         cards.add(new SetCardInfo("Golgari Guildgate", 247, Rarity.COMMON, mage.cards.g.GolgariGuildgate.class));
         cards.add(new SetCardInfo("Golgari Rot Farm", 248, Rarity.UNCOMMON, mage.cards.g.GolgariRotFarm.class));
         cards.add(new SetCardInfo("Great Oak Guardian", 170, Rarity.UNCOMMON, mage.cards.g.GreatOakGuardian.class));
+        cards.add(new SetCardInfo("Greven, Predator Captain", 43, Rarity.MYTHIC, mage.cards.g.GrevenPredatorCaptain.class));
         cards.add(new SetCardInfo("Grim Haruspex", 118, Rarity.RARE, mage.cards.g.GrimHaruspex.class));
         cards.add(new SetCardInfo("Grimoire of the Dead", 213, Rarity.MYTHIC, mage.cards.g.GrimoireOfTheDead.class));
         cards.add(new SetCardInfo("Grismold, the Dreadsower", 44, Rarity.RARE, mage.cards.g.GrismoldTheDreadsower.class));