[LCI] Implement Didact Echo

Mage.Sets/src/mage/cards/d/DidactEcho.java

@@ -0,0 +1,50 @@
+package mage.cards.d;
+
+import mage.MageInt;
+import mage.abilities.common.EntersBattlefieldTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.condition.common.DescendCondition;
+import mage.abilities.decorator.ConditionalContinuousEffect;
+import mage.abilities.effects.common.DrawCardSourceControllerEffect;
+import mage.abilities.effects.common.continuous.GainAbilitySourceEffect;
+import mage.abilities.keyword.FlyingAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.AbilityWord;
+import mage.constants.CardType;
+import mage.constants.SubType;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class DidactEcho extends CardImpl {
+
+    public DidactEcho(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{4}{U}");
+
+        this.subtype.add(SubType.SPIRIT);
+        this.subtype.add(SubType.CLERIC);
+        this.power = new MageInt(3);
+        this.toughness = new MageInt(2);
+
+        // When Didact Echo enters the battlefield, draw a card.
+        this.addAbility(new EntersBattlefieldTriggeredAbility(new DrawCardSourceControllerEffect(1)));
+
+        // Descend 4 -- Didact Echo has flying as long as there are four or more permanent cards in your graveyard.
+        this.addAbility(new SimpleStaticAbility(new ConditionalContinuousEffect(
+                new GainAbilitySourceEffect(FlyingAbility.getInstance()), DescendCondition.FOUR,
+                "{this} has flying as long as there are four or more permanent cards in your graveyard"
+        )).setAbilityWord(AbilityWord.DESCEND_4).addHint(DescendCondition.getHint()));
+    }
+
+    private DidactEcho(final DidactEcho card) {
+        super(card);
+    }
+
+    @Override
+    public DidactEcho copy() {
+        return new DidactEcho(this);
+    }
+}

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

@@ -24,6 +24,7 @@ public final class TheLostCavernsOfIxalan extends ExpansionSet {
         cards.add(new SetCardInfo("Cavern of Souls", 269, Rarity.MYTHIC, mage.cards.c.CavernOfSouls.class));
         cards.add(new SetCardInfo("Cenote Scout", 178, Rarity.UNCOMMON, mage.cards.c.CenoteScout.class));
         cards.add(new SetCardInfo("Chart a Course", 48, Rarity.COMMON, mage.cards.c.ChartACourse.class));
+        cards.add(new SetCardInfo("Didact Echo", 53, Rarity.COMMON, mage.cards.d.DidactEcho.class));
         cards.add(new SetCardInfo("Forest", 291, Rarity.LAND, mage.cards.basiclands.Forest.class, FULL_ART_BFZ_VARIOUS));
         cards.add(new SetCardInfo("Ghalta, Stampede Tyrant", 185, Rarity.MYTHIC, mage.cards.g.GhaltaStampedeTyrant.class));
         cards.add(new SetCardInfo("Gishath, Sun's Avatar", 330, Rarity.MYTHIC, mage.cards.g.GishathSunsAvatar.class));

Mage/src/main/java/mage/abilities/condition/common/DescendCondition.java

@@ -0,0 +1,44 @@
+package mage.abilities.condition.common;
+
+import mage.abilities.Ability;
+import mage.abilities.condition.Condition;
+import mage.abilities.dynamicvalue.common.CardsInControllerGraveyardCount;
+import mage.abilities.hint.Hint;
+import mage.abilities.hint.ValueHint;
+import mage.filter.StaticFilters;
+import mage.game.Game;
+import mage.players.Player;
+import mage.util.CardUtil;
+
+/**
+ * @author TheElk801
+ */
+public enum DescendCondition implements Condition {
+    FOUR(4),
+    EIGHT(8);
+    private static final Hint hint = new ValueHint(
+            "Permanent cards in you graveyard",
+            new CardsInControllerGraveyardCount(StaticFilters.FILTER_CARD_PERMANENT)
+    );
+
+    public static Hint getHint() {
+        return hint;
+    }
+
+    private final int amount;
+
+    DescendCondition(int amount) {
+        this.amount = amount;
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        return player != null && player.getGraveyard().count(StaticFilters.FILTER_CARD_PERMANENT, game) >= amount;
+    }
+
+    @Override
+    public String toString() {
+        return "there are " + CardUtil.numberToText(amount) + " or more permanent cards in your graveyard";
+    }
+}

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

@@ -22,6 +22,7 @@ public enum AbilityWord {
     COUNCILS_DILEMMA("Council's dilemma"),
     COVEN("Coven"),
     DELIRIUM("Delirium"),
+    DESCEND_4("Descent 4"),
     DOMAIN("Domain"),
     EMINENCE("Eminence"),
     ENRAGE("Enrage"),