Cleaned up unneeded imports for Goblin Wizard.

Added Magewright's Stone.

Modified AbilityPredicate to allow for Magewright's stone to search specifically for creatures containing {T} in their mana cost.

Mage.Sets/src/mage/sets/dissension/MagewrightsStone.java

@@ -0,0 +1,75 @@
+/*
+ *  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.sets.dissension;
+
+import java.util.UUID;
+import mage.abilities.Ability;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.costs.common.TapSourceCost;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.effects.common.UntapTargetEffect;
+import mage.cards.CardImpl;
+import mage.constants.CardType;
+import mage.constants.Rarity;
+import mage.constants.Zone;
+import mage.filter.common.FilterCreaturePermanent;
+import mage.filter.predicate.mageobject.AbilityPredicate;
+import mage.target.common.TargetCreaturePermanent;
+
+/**
+ *
+ * @author BursegSardaukar
+ */
+public class MagewrightsStone extends CardImpl {
+    
+    private static final FilterCreaturePermanent filter = new FilterCreaturePermanent("creature that has an ability with {T} in its cost");
+    
+    static {
+        filter.add(new AbilityPredicate(SimpleActivatedAbility.class));
+    }
+    
+    public MagewrightsStone(UUID ownerId) {
+        super(ownerId, 162, "Magewright's Stone", Rarity.UNCOMMON, new CardType[]{CardType.ARTIFACT}, "{2}");
+        this.expansionSetCode = "DIS";
+
+        // {1}, {tap}: Untap target creature that has an activated ability with {T} in its cost.
+        Ability ability = new SimpleActivatedAbility(Zone.BATTLEFIELD, new UntapTargetEffect(), new ManaCostsImpl("{1}"));
+        ability.addCost(new TapSourceCost());
+        ability.addTarget(new TargetCreaturePermanent(filter));
+        this.addAbility(ability);
+    }
+
+    public MagewrightsStone(final MagewrightsStone card) {
+        super(card);
+    }
+
+    @Override
+    public MagewrightsStone copy() {
+        return new MagewrightsStone(this);
+    }
+}

Mage.Sets/src/mage/sets/thedark/GoblinWizard.java

@@ -31,40 +31,24 @@ import java.util.UUID;
 import mage.MageInt;
 import mage.ObjectColor;
 import mage.abilities.Ability;
-import mage.abilities.common.DealsDamageToAPlayerTriggeredAbility;
 import mage.abilities.costs.common.TapSourceCost;
 import mage.abilities.costs.mana.ManaCostsImpl;
-import mage.abilities.effects.OneShotEffect;
 import mage.abilities.effects.common.continuous.GainAbilityTargetEffect;
 import mage.abilities.common.SimpleActivatedAbility;
 import mage.abilities.effects.common.PutPermanentOnBattlefieldEffect;
 import mage.abilities.keyword.ProtectionAbility;
-import mage.cards.Card;
 import mage.cards.CardImpl;
 import mage.constants.CardType;
 import mage.constants.Duration;
-import mage.constants.Outcome;
 import mage.constants.Rarity;
 import mage.constants.Zone;
-import mage.counters.CounterType;
-import mage.filter.Filter;
 import mage.filter.FilterCard;
 import mage.filter.FilterPermanent;
-import mage.filter.common.FilterBySubtypeCard;
-import mage.filter.common.FilterCreatureCard;
-import mage.filter.common.FilterCreaturePermanent;
 import mage.filter.common.FilterPermanentCard;
-import mage.filter.predicate.Predicates;
 import mage.filter.predicate.mageobject.ColorPredicate;
-import mage.filter.predicate.mageobject.ConvertedManaCostPredicate;
 import mage.filter.predicate.mageobject.SubtypePredicate;
-import mage.game.Game;
-import mage.game.permanent.Permanent;
-import mage.players.Player;
 import mage.target.Target;
 import mage.target.TargetPermanent;
-import mage.target.common.TargetCardInHand;
-import mage.target.common.TargetCreaturePermanent;
 
 /**
  *

Mage/src/mage/filter/predicate/mageobject/AbilityPredicate.java

@@ -30,6 +30,10 @@ package mage.filter.predicate.mageobject;
 import mage.MageObject;
 import mage.abilities.Abilities;
 import mage.abilities.Ability;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.costs.Cost;
+import mage.abilities.costs.common.DiscardCardCost;
+import mage.abilities.costs.common.TapSourceCost;
 import mage.cards.Card;
 import mage.filter.predicate.Predicate;
 import mage.game.Game;
@@ -57,7 +61,18 @@ public class AbilityPredicate implements Predicate<MageObject> {
         
         for (Ability ability : abilities) {
             if (abilityClass.equals(ability.getClass())) {
-                return true;
+                //Burseg Hack: Magewright's Stone [DIS] specifically looks for activated ability containing {T}
+                //As of 9/13/2015, no other AbilityPredicate is filtering for SimpleActivatedAbility 
+                if (abilityClass.equals(SimpleActivatedAbility.class) && ability.getCosts().size() > 0){
+                    for (Cost cost : ability.getCosts()) {
+                        if (cost instanceof TapSourceCost) {
+                            return true;
+                        }
+                    }
+                    return false;
+                } else {
+                    return true;
+                }
             }
         }
         return false;