Implemented Thought Sponge

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

@@ -77,7 +77,7 @@ class TectonicHellionEffect extends OneShotEffect {
         int max = landMap
                 .values()
                 .stream()
-                .max(Math::max)
+                .max(Integer::compare)
                 .get();
         Effect effect = new SacrificeEffect(StaticFilters.FILTER_LANDS, 2, "");
         game.getState()

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

@@ -0,0 +1,88 @@
+package mage.cards.t;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.DiesTriggeredAbility;
+import mage.abilities.common.EntersBattlefieldAbility;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.dynamicvalue.common.SourcePermanentPowerCount;
+import mage.abilities.effects.Effect;
+import mage.abilities.effects.common.DrawCardSourceControllerEffect;
+import mage.abilities.effects.common.counter.AddCountersSourceEffect;
+import mage.abilities.keyword.FlashAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.counters.CounterType;
+import mage.game.Game;
+import mage.watchers.common.CardsDrawnThisTurnWatcher;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class ThoughtSponge extends CardImpl {
+
+    private static final DynamicValue xValue = new SourcePermanentPowerCount();
+
+    public ThoughtSponge(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{3}{U}");
+
+        this.subtype.add(SubType.SPONGE);
+        this.power = new MageInt(1);
+        this.toughness = new MageInt(1);
+
+        // Flash
+        this.addAbility(FlashAbility.getInstance());
+
+        // Thought Sponge enters the battlefield with a number of +1/+1 counters on it equal to the greatest number of cards an opponent has drawn this turn.
+        this.addAbility(new EntersBattlefieldAbility(new AddCountersSourceEffect(
+                CounterType.P1P1.createInstance(), ThoughtSpongeValue.instance, false
+        ), "with a number of +1/+1 counters on it equal to " +
+                "the greatest number of cards an opponent has drawn this turn"
+        ), new CardsDrawnThisTurnWatcher());
+
+        // When Thought Sponge dies, draw cards equal to its power.
+        this.addAbility(new DiesTriggeredAbility(
+                new DrawCardSourceControllerEffect(xValue).setText("draw cards equal to its power")
+        ));
+    }
+
+    private ThoughtSponge(final ThoughtSponge card) {
+        super(card);
+    }
+
+    @Override
+    public ThoughtSponge copy() {
+        return new ThoughtSponge(this);
+    }
+}
+
+enum ThoughtSpongeValue implements DynamicValue {
+    instance;
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility, Effect effect) {
+        CardsDrawnThisTurnWatcher watcher = game.getState().getWatcher(CardsDrawnThisTurnWatcher.class);
+        if (watcher == null) {
+            return 0;
+        }
+        return game.getOpponents(sourceAbility.getControllerId())
+                .stream()
+                .map(watcher::getCardsDrawnThisTurn)
+                .max(Integer::compare)
+                .get();
+    }
+
+    @Override
+    public DynamicValue copy() {
+        return instance;
+    }
+
+    @Override
+    public String getMessage() {
+        return "";
+    }
+}

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

@@ -197,6 +197,7 @@ public final class Commander2019Edition extends ExpansionSet {
         cards.add(new SetCardInfo("Thespian's Stage", 282, Rarity.RARE, mage.cards.t.ThespiansStage.class));
         cards.add(new SetCardInfo("Think Twice", 99, Rarity.COMMON, mage.cards.t.ThinkTwice.class));
         cards.add(new SetCardInfo("Thornwood Falls", 283, Rarity.COMMON, mage.cards.t.ThornwoodFalls.class));
+        cards.add(new SetCardInfo("Thought Sponge", 12, Rarity.RARE, mage.cards.t.ThoughtSponge.class));
         cards.add(new SetCardInfo("Thousand Winds", 100, Rarity.RARE, mage.cards.t.ThousandWinds.class));
         cards.add(new SetCardInfo("Thragtusk", 185, Rarity.RARE, mage.cards.t.Thragtusk.class));
         cards.add(new SetCardInfo("Thran Dynamo", 225, Rarity.UNCOMMON, mage.cards.t.ThranDynamo.class));