Remove redundant InvertCondition and used instead UnlessCondition.

Mage.Sets/src/mage/sets/innistrad/MayorOfAvabruck.java

@@ -31,7 +31,6 @@ import mage.MageInt;
 import mage.abilities.TriggeredAbility;
 import mage.abilities.common.BeginningOfUpkeepTriggeredAbility;
 import mage.abilities.common.SimpleStaticAbility;
-import mage.abilities.condition.common.InvertCondition;
 import mage.abilities.condition.common.NoSpellsWereCastLastTurnCondition;
 import mage.abilities.condition.common.TransformedCondition;
 import mage.abilities.decorator.ConditionalContinousEffect;
@@ -46,6 +45,7 @@ import mage.filter.common.FilterCreaturePermanent;
 import mage.filter.predicate.mageobject.SubtypePredicate;
 
 import java.util.UUID;
+import mage.abilities.condition.common.UnlessCondition;
 
 /**
  *
@@ -76,7 +76,7 @@ public class MayorOfAvabruck extends CardImpl<MayorOfAvabruck> {
         this.toughness = new MageInt(1);
 
         // Other Human creatures you control get +1/+1.
-        Effect effect = new ConditionalContinousEffect(new BoostControlledEffect(1, 1, Duration.WhileOnBattlefield, filter, true), new InvertCondition(new TransformedCondition()), ruleText);
+        Effect effect = new ConditionalContinousEffect(new BoostControlledEffect(1, 1, Duration.WhileOnBattlefield, filter, true), new UnlessCondition(new TransformedCondition()), ruleText);
         this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, effect));
 
         // At the beginning of each upkeep, if no spells were cast last turn, transform Mayor of Avabruck.

Mage.Sets/src/mage/sets/magic2014/ShadowbornDemon.java

@@ -34,7 +34,7 @@ import mage.abilities.TriggeredAbility;
 import mage.abilities.common.BeginningOfUpkeepTriggeredAbility;
 import mage.abilities.common.EntersBattlefieldTriggeredAbility;
 import mage.abilities.condition.Condition;
-import mage.abilities.condition.common.InvertCondition;
+import mage.abilities.condition.common.UnlessCondition;
 import mage.abilities.decorator.ConditionalTriggeredAbility;
 import mage.abilities.effects.common.DestroyTargetEffect;
 import mage.abilities.effects.common.SacrificeTargetEffect;
@@ -88,7 +88,7 @@ public class ShadowbornDemon extends CardImpl<ShadowbornDemon> {
         triggeredAbility.addTarget(target);
         this.addAbility(new ConditionalTriggeredAbility(
                 triggeredAbility,
-                new InvertCondition(new CreatureCardsInControllerGraveCondition(6)),
+                new UnlessCondition(new CreatureCardsInControllerGraveCondition(6)),
                 "At the beginning of your upkeep, if there are fewer than six creature cards in your graveyard, sacrifice a creature"));
 
     }

Mage.Sets/src/mage/sets/modernmasters/Epochrasite.java

@@ -33,7 +33,7 @@ import mage.abilities.Ability;
 import mage.abilities.common.DiesTriggeredAbility;
 import mage.abilities.common.EntersBattlefieldAbility;
 import mage.abilities.condition.common.CastFromHandCondition;
-import mage.abilities.condition.common.InvertCondition;
+import mage.abilities.condition.common.UnlessCondition;
 import mage.abilities.dynamicvalue.common.StaticValue;
 import mage.abilities.effects.common.ExileSourceEffect;
 import mage.abilities.effects.common.continious.GainAbilitySourceEffect;
@@ -65,7 +65,7 @@ public class Epochrasite extends CardImpl<Epochrasite> {
         // Epochrasite enters the battlefield with three +1/+1 counters on it if you didn't cast it from your hand.
         this.addAbility(new EntersBattlefieldAbility(
                     new AddCountersSourceEffect(CounterType.P1P1.createInstance(3)),
-                    new InvertCondition(new CastFromHandCondition()), true,
+                    new UnlessCondition(new CastFromHandCondition()), true,
                     "{this} enters the battlefield with three +1/+1 counters on it if you didn't cast it from your hand",""));
 
         // When Epochrasite dies, exile it with three time counters on it and it gains suspend.

Mage/src/mage/abilities/condition/common/InvertCondition.java

@@ -1,59 +0,0 @@
-/*
- *  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.abilities.condition.common;
-
-import mage.abilities.Ability;
-import mage.abilities.condition.Condition;
-import mage.game.Game;
-
-/**
- * A simple {@link mage.abilities.condition.Condition} to invert a decorated conditions
- * {@link mage.abilities.condition.Condition#apply(mage.game.Game, mage.abilities.Ability) apply(mage.game.Game, mage.abilities.Ability)}
- *  method invocation.
- *  
- *  The copy for {@link UnlessCondition}.
- *
- * @author noxx
- */
-public class InvertCondition implements Condition {
-
-    private Condition condition;
-
-    public InvertCondition(Condition condition) {
-        this.condition = condition;
-    }
-
-    /*
-     * {@inheritDoc}
-     */
-    @Override
-    public boolean apply(Game game, Ability source) {
-        return !condition.apply(game, source);
-    }
-
-}