[MOM] Implement Ancient Imperiosaur

Mage.Sets/src/mage/cards/a/AncientImperiosaur.java

@@ -0,0 +1,59 @@
+package mage.cards.a;
+
+import mage.MageInt;
+import mage.abilities.common.EntersBattlefieldAbility;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.dynamicvalue.MultipliedValue;
+import mage.abilities.dynamicvalue.common.ConvokedSourceCount;
+import mage.abilities.effects.common.counter.AddCountersSourceEffect;
+import mage.abilities.keyword.ConvokeAbility;
+import mage.abilities.keyword.TrampleAbility;
+import mage.abilities.keyword.WardAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.counters.CounterType;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class AncientImperiosaur extends CardImpl {
+
+    private static final DynamicValue xValue = new MultipliedValue(ConvokedSourceCount.SPELL, 2);
+
+    public AncientImperiosaur(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{5}{G}{G}");
+
+        this.subtype.add(SubType.DINOSAUR);
+        this.power = new MageInt(6);
+        this.toughness = new MageInt(6);
+
+        // Convoke
+        this.addAbility(new ConvokeAbility());
+
+        // Trample
+        this.addAbility(TrampleAbility.getInstance());
+
+        // Ward {2}
+        this.addAbility(new WardAbility(new ManaCostsImpl<>("{2}"), false));
+
+        // Ancient Imperiosaur enters the battlefield with two +1/+1 counters on it for each creature that convoked it.
+        this.addAbility(new EntersBattlefieldAbility(new AddCountersSourceEffect(
+                CounterType.P1P1.createInstance(), xValue, true
+        ), null, "{this} enters the battlefield with two " +
+                "+1/+1 counters on it for each creature that convoked it", null));
+    }
+
+    private AncientImperiosaur(final AncientImperiosaur card) {
+        super(card);
+    }
+
+    @Override
+    public AncientImperiosaur copy() {
+        return new AncientImperiosaur(this);
+    }
+}

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

@@ -30,6 +30,7 @@ public final class MarchOfTheMachine extends ExpansionSet {
         cards.add(new SetCardInfo("Akki Scrapchomper", 130, Rarity.COMMON, mage.cards.a.AkkiScrapchomper.class));
         cards.add(new SetCardInfo("Alabaster Host Intercessor", 3, Rarity.COMMON, mage.cards.a.AlabasterHostIntercessor.class));
         cards.add(new SetCardInfo("Alabaster Host Sanctifier", 4, Rarity.COMMON, mage.cards.a.AlabasterHostSanctifier.class));
+        cards.add(new SetCardInfo("Ancient Imperiosaur", 174, Rarity.RARE, mage.cards.a.AncientImperiosaur.class));
         cards.add(new SetCardInfo("Arachnoid Adaptation", 175, Rarity.COMMON, mage.cards.a.ArachnoidAdaptation.class));
         cards.add(new SetCardInfo("Archangel Elspeth", 6, Rarity.MYTHIC, mage.cards.a.ArchangelElspeth.class));
         cards.add(new SetCardInfo("Archpriest of Shadows", 89, Rarity.RARE, mage.cards.a.ArchpriestOfShadows.class));

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

@@ -0,0 +1,41 @@
+package mage.abilities.dynamicvalue.common;
+
+import mage.MageObjectReference;
+import mage.abilities.Ability;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.effects.Effect;
+import mage.game.Game;
+import mage.watchers.common.ConvokeWatcher;
+
+/**
+ * @author TheElk801
+ */
+public enum ConvokedSourceCount implements DynamicValue {
+    PERMANENT(-1),
+    SPELL(0);
+    private final int offset;
+
+    ConvokedSourceCount(int offset) {
+        this.offset = offset;
+    }
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility, Effect effect) {
+        return ConvokeWatcher.getConvokingCreatures(new MageObjectReference(sourceAbility, offset), game).size();
+    }
+
+    @Override
+    public ConvokedSourceCount copy() {
+        return this;
+    }
+
+    @Override
+    public String getMessage() {
+        return "creature that convoked it";
+    }
+
+    @Override
+    public String toString() {
+        return "1";
+    }
+}