[DSK] Implement Miasma Demon

Mage.Sets/src/mage/cards/m/MiasmaDemon.java

@@ -0,0 +1,85 @@
+package mage.cards.m;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.EntersBattlefieldTriggeredAbility;
+import mage.abilities.common.delayed.ReflexiveTriggeredAbility;
+import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.continuous.BoostTargetEffect;
+import mage.abilities.keyword.FlyingAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Outcome;
+import mage.constants.SubType;
+import mage.game.Game;
+import mage.players.Player;
+import mage.target.common.TargetCreaturePermanent;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class MiasmaDemon extends CardImpl {
+
+    public MiasmaDemon(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{4}{B}{B}");
+
+        this.subtype.add(SubType.DEMON);
+        this.power = new MageInt(5);
+        this.toughness = new MageInt(4);
+
+        // Flying
+        this.addAbility(FlyingAbility.getInstance());
+
+        // When Miasma Demon enters, you may discard any number of cards. When you do, up to that many target creatures each get -2/-2 until end of turn.
+        this.addAbility(new EntersBattlefieldTriggeredAbility(new MiasmaDemonEffect()));
+    }
+
+    private MiasmaDemon(final MiasmaDemon card) {
+        super(card);
+    }
+
+    @Override
+    public MiasmaDemon copy() {
+        return new MiasmaDemon(this);
+    }
+}
+
+class MiasmaDemonEffect extends OneShotEffect {
+
+    MiasmaDemonEffect() {
+        super(Outcome.Benefit);
+        staticText = "you may discard any number of cards. When you do, " +
+                "up to that many target creatures each get -2/-2 until end of turn";
+    }
+
+    private MiasmaDemonEffect(final MiasmaDemonEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public MiasmaDemonEffect copy() {
+        return new MiasmaDemonEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        if (player == null) {
+            return false;
+        }
+        int amount = player.discard(0, Integer.MAX_VALUE, false, source, game).size();
+        if (amount < 1) {
+            return false;
+        }
+        ReflexiveTriggeredAbility ability = new ReflexiveTriggeredAbility(
+                new BoostTargetEffect(-2, -2), false,
+                "Up to that many target creatures each get -2/-2 until end of turn"
+        );
+        ability.addTarget(new TargetCreaturePermanent(0, amount));
+        game.fireReflexiveTriggeredAbility(ability, source);
+        return true;
+    }
+}

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

@@ -127,6 +127,7 @@ public final class DuskmournHouseOfHorror extends ExpansionSet {
         cards.add(new SetCardInfo("Malevolent Chandelier", 252, Rarity.COMMON, mage.cards.m.MalevolentChandelier.class));
         cards.add(new SetCardInfo("Manifest Dread", 189, Rarity.COMMON, mage.cards.m.ManifestDread.class));
         cards.add(new SetCardInfo("Marina Vendrell's Grimoire", 64, Rarity.RARE, mage.cards.m.MarinaVendrellsGrimoire.class));
+        cards.add(new SetCardInfo("Miasma Demon", 109, Rarity.UNCOMMON, mage.cards.m.MiasmaDemon.class));
         cards.add(new SetCardInfo("Midnight Mayhem", 222, Rarity.UNCOMMON, mage.cards.m.MidnightMayhem.class));
         cards.add(new SetCardInfo("Most Valuable Slayer", 144, Rarity.COMMON, mage.cards.m.MostValuableSlayer.class));
         cards.add(new SetCardInfo("Mountain", 275, Rarity.LAND, mage.cards.basiclands.Mountain.class, FULL_ART_BFZ_VARIOUS));