Implemented Titan's Nest

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

@@ -0,0 +1,132 @@
+package mage.cards.t;
+
+import mage.ConditionalMana;
+import mage.MageObject;
+import mage.Mana;
+import mage.abilities.Ability;
+import mage.abilities.SpellAbility;
+import mage.abilities.common.BeginningOfUpkeepTriggeredAbility;
+import mage.abilities.costs.Cost;
+import mage.abilities.costs.common.ExileFromGraveCost;
+import mage.abilities.costs.mana.ManaCosts;
+import mage.abilities.costs.mana.VariableManaCost;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.mana.BasicManaEffect;
+import mage.abilities.mana.ActivatedManaAbilityImpl;
+import mage.abilities.mana.conditional.ManaCondition;
+import mage.cards.Card;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Outcome;
+import mage.constants.TargetController;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.players.Player;
+import mage.target.common.TargetCardInYourGraveyard;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class TitansNest extends CardImpl {
+
+    public TitansNest(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{1}{B}{G}{U}");
+
+        // At the beginning of your upkeep, look at the top card of your library. You may put that card into your graveyard.
+        this.addAbility(new BeginningOfUpkeepTriggeredAbility(
+                new TitansNestEffect(), TargetController.YOU, false
+        ));
+
+        // Exile a card from your graveyard: Add {C}. Spend this mana only to cast a colored spell without {X} in its mana cost.
+        this.addAbility(new TitansNestManaAbility());
+    }
+
+    private TitansNest(final TitansNest card) {
+        super(card);
+    }
+
+    @Override
+    public TitansNest copy() {
+        return new TitansNest(this);
+    }
+}
+
+class TitansNestEffect extends OneShotEffect {
+
+    TitansNestEffect() {
+        super(Outcome.Benefit);
+        staticText = "look at the top card of your library. You may put that card into your graveyard";
+    }
+
+    private TitansNestEffect(final TitansNestEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public TitansNestEffect copy() {
+        return new TitansNestEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        if (player == null) {
+            return false;
+        }
+        Card card = player.getLibrary().getFromTop(game);
+        if (card == null) {
+            return false;
+        }
+        player.lookAtCards("", card, game);
+        return player.chooseUse(outcome, "Put " + card.getName() + " into your graveyard?", source, game)
+                && player.moveCards(card, Zone.GRAVEYARD, source, game);
+    }
+}
+
+class TitansNestManaAbility extends ActivatedManaAbilityImpl {
+
+    TitansNestManaAbility() {
+        super(Zone.BATTLEFIELD, new BasicManaEffect(new TitansNestConditionalMana()), new ExileFromGraveCost(new TargetCardInYourGraveyard()));
+        this.netMana.add(Mana.ColorlessMana(1));
+    }
+
+    private TitansNestManaAbility(TitansNestManaAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public TitansNestManaAbility copy() {
+        return new TitansNestManaAbility(this);
+    }
+}
+
+class TitansNestConditionalMana extends ConditionalMana {
+
+    TitansNestConditionalMana() {
+        super(Mana.ColorlessMana(1));
+        staticText = "Spend this mana only to cast a colored spell without {X} in its mana cost.";
+        addCondition(new TitansNestManaCondition());
+    }
+}
+
+class TitansNestManaCondition extends ManaCondition {
+
+    @Override
+    public boolean apply(Game game, Ability source, UUID originalId, Cost costToPay) {
+        if (!(source instanceof SpellAbility)) {
+            return false;
+        }
+        MageObject object = game.getObject(source.getSourceId());
+        if (object == null || object.getColor(game).isColorless()) {
+            return false;
+        }
+        if (costToPay instanceof ManaCosts) {
+            return ((ManaCosts) costToPay).getVariableCosts().isEmpty();
+        } else {
+            return !(costToPay instanceof VariableManaCost);
+        }
+    }
+}

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

@@ -300,6 +300,7 @@ public final class IkoriaLairOfBehemoths extends ExpansionSet {
         cards.add(new SetCardInfo("Thornwood Falls", 256, Rarity.COMMON, mage.cards.t.ThornwoodFalls.class));
         cards.add(new SetCardInfo("Thwart the Enemy", 173, Rarity.COMMON, mage.cards.t.ThwartTheEnemy.class));
         cards.add(new SetCardInfo("Titanoth Rex", 174, Rarity.UNCOMMON, mage.cards.t.TitanothRex.class));
+        cards.add(new SetCardInfo("Titans' Nest", 212, Rarity.RARE, mage.cards.t.TitansNest.class));
         cards.add(new SetCardInfo("Tranquil Cove", 257, Rarity.COMMON, mage.cards.t.TranquilCove.class));
         cards.add(new SetCardInfo("Trumpeting Gnarr", 213, Rarity.UNCOMMON, mage.cards.t.TrumpetingGnarr.class));
         cards.add(new SetCardInfo("Umori, the Collector", 231, Rarity.RARE, mage.cards.u.UmoriTheCollector.class));