[LCI] Implement Didact Echo

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"),