Implement Hum of the Radix

Tested various situations and verified it behaves correctly.  Tested
with multiple instances of the card on both side of the battlefield and
verified that the effect stacks properly. (At least this is my
understanding of how the card works)

Mage.Sets/src/mage/cards/h/HumOfTheRadix.java

@@ -0,0 +1,104 @@
+/*
+ *  Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without modification, are
+ *  permitted provided that the following conditions are met:
+ *
+ *     1. Redistributions of source code must retain the above copyright notice, this list of
+ *        conditions and the following disclaimer.
+ *
+ *     2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *        of conditions and the following disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ *  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
+ *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ *  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  The views and conclusions contained in the software and documentation are those of the
+ *  authors and should not be interpreted as representing official policies, either expressed
+ *  or implied, of BetaSteward_at_googlemail.com.
+ */
+package mage.cards.h;
+
+import mage.MageObject;
+import mage.abilities.Ability;
+import mage.abilities.SpellAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.effects.common.cost.CostModificationEffectImpl;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.common.FilterControlledArtifactPermanent;
+import mage.game.Game;
+import mage.util.CardUtil;
+
+import java.util.UUID;
+
+/**
+ *
+ * @author Pete Rossi
+ */
+public class HumOfTheRadix extends CardImpl {
+
+    public HumOfTheRadix(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{2}{G}{G}");
+
+        // Each artifact spell costs {1} more to cast for each artifact its controller controls.
+        this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new HumOfTheRadixCostIncreaseEffect()));
+
+    }
+
+    public HumOfTheRadix(final HumOfTheRadix card) {
+        super(card);
+    }
+
+    @Override
+    public HumOfTheRadix copy() {
+        return new HumOfTheRadix(this);
+    }
+}
+
+class HumOfTheRadixCostIncreaseEffect extends CostModificationEffectImpl {
+
+    HumOfTheRadixCostIncreaseEffect() {
+        super(Duration.Custom, Outcome.Detriment, CostModificationType.INCREASE_COST);
+        staticText = "Each artifact spell costs {1} more to cast for each artifact its controller controls.";
+    }
+
+    HumOfTheRadixCostIncreaseEffect(final HumOfTheRadixCostIncreaseEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source, Ability abilityToModify) {
+        FilterControlledArtifactPermanent filter = new FilterControlledArtifactPermanent("artifacts you control");
+        int additionalCost = game.getBattlefield().getActivePermanents(filter, abilityToModify.getControllerId(), game).size();
+        if (additionalCost > 0) {
+            CardUtil.increaseCost(abilityToModify, additionalCost);
+        }
+        return true;
+    }
+
+    @Override
+    public boolean applies(Ability abilityToModify, Ability source, Game game) {
+        if (abilityToModify instanceof SpellAbility) {
+            MageObject sourceObject = abilityToModify.getSourceObject(game);
+            if (sourceObject != null && sourceObject.getCardType().contains(CardType.ARTIFACT)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public HumOfTheRadixCostIncreaseEffect copy() {
+        return new HumOfTheRadixCostIncreaseEffect(this);
+    }
+}

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

@@ -115,6 +115,7 @@ public class Mirrodin extends ExpansionSet {
         cards.add(new SetCardInfo("Groffskithur", 121, Rarity.COMMON, mage.cards.g.Groffskithur.class));
         cards.add(new SetCardInfo("Heartwood Shard", 184, Rarity.UNCOMMON, mage.cards.h.HeartwoodShard.class));
         cards.add(new SetCardInfo("Hematite Golem", 185, Rarity.COMMON, mage.cards.h.HematiteGolem.class));
+        cards.add(new SetCardInfo("Hum of the Radix", 122, Rarity.RARE, mage.cards.h.HumOfTheRadix.class));
         cards.add(new SetCardInfo("Icy Manipulator", 186, Rarity.UNCOMMON, mage.cards.i.IcyManipulator.class));
         cards.add(new SetCardInfo("Incite War", 96, Rarity.COMMON, mage.cards.i.InciteWar.class));
         cards.add(new SetCardInfo("Inertia Bubble", 37, Rarity.COMMON, mage.cards.i.InertiaBubble.class));