Implemented Deathless Knight

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

@@ -0,0 +1,93 @@
+package mage.cards.d;
+
+import mage.MageInt;
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.effects.common.ReturnSourceFromGraveyardToHandEffect;
+import mage.abilities.keyword.HasteAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class DeathlessKnight extends CardImpl {
+
+    public DeathlessKnight(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{B/G}{B/G}{B/G}{B/G}");
+
+        this.subtype.add(SubType.SKELETON);
+        this.subtype.add(SubType.KNIGHT);
+        this.power = new MageInt(4);
+        this.toughness = new MageInt(2);
+
+        // Haste
+        this.addAbility(HasteAbility.getInstance());
+
+        // When you gain life for the first time each turn, return Deathless Knight from your graveyard to your hand.
+        this.addAbility(new DeathlessKnightTriggeredAbility());
+    }
+
+    private DeathlessKnight(final DeathlessKnight card) {
+        super(card);
+    }
+
+    @Override
+    public DeathlessKnight copy() {
+        return new DeathlessKnight(this);
+    }
+}
+
+class DeathlessKnightTriggeredAbility extends TriggeredAbilityImpl {
+
+    private boolean triggeredOnce = false;
+
+    DeathlessKnightTriggeredAbility() {
+        super(Zone.ALL, new ReturnSourceFromGraveyardToHandEffect(), false);
+    }
+
+    private DeathlessKnightTriggeredAbility(final DeathlessKnightTriggeredAbility ability) {
+        super(ability);
+        this.triggeredOnce = ability.triggeredOnce;
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.GAINED_LIFE
+                || event.getType() == GameEvent.EventType.END_PHASE_POST;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        if (event.getType() == GameEvent.EventType.END_PHASE_POST) {
+            triggeredOnce = false;
+            return false;
+        }
+        if (event.getType() != GameEvent.EventType.GAINED_LIFE
+                || !event.getPlayerId().equals(controllerId)
+                || game.getState().getZone(this.getSourceId()) == Zone.GRAVEYARD) {
+            return false;
+        }
+        if (triggeredOnce) {
+            return false;
+        }
+        triggeredOnce = true;
+        return true;
+    }
+
+    @Override
+    public String getRule() {
+        return "When you gain life for the first time each turn, return {this} from your graveyard to your hand.";
+    }
+
+    @Override
+    public DeathlessKnightTriggeredAbility copy() {
+        return new DeathlessKnightTriggeredAbility(this);
+    }
+}

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

@@ -76,6 +76,7 @@ public final class ThroneOfEldraine extends ExpansionSet {
         cards.add(new SetCardInfo("Curious Pair", 150, Rarity.COMMON, mage.cards.c.CuriousPair.class));
         cards.add(new SetCardInfo("Dance of the Manse", 186, Rarity.RARE, mage.cards.d.DanceOfTheManse.class));
         cards.add(new SetCardInfo("Deafening Silence", 10, Rarity.UNCOMMON, mage.cards.d.DeafeningSilence.class));
+        cards.add(new SetCardInfo("Deathless Knight", 208, Rarity.UNCOMMON, mage.cards.d.DeathlessKnight.class));
         cards.add(new SetCardInfo("Didn't Say Please", 42, Rarity.COMMON, mage.cards.d.DidntSayPlease.class));
         cards.add(new SetCardInfo("Doom Foretold", 187, Rarity.RARE, mage.cards.d.DoomForetold.class));
         cards.add(new SetCardInfo("Drown in the Loch", 188, Rarity.UNCOMMON, mage.cards.d.DrownInTheLoch.class));