* Fixed a problem with emerge, that the spell could not be cast with emerge, if the player had less mana available as the full emerge mana costs.

Mage.Sets/src/mage/cards/w/WretchedGryff.java

@@ -45,18 +45,18 @@ import mage.constants.CardType;
 public class WretchedGryff extends CardImpl {
 
     public WretchedGryff(UUID ownerId, CardSetInfo setInfo) {
-        super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{7}");
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{7}");
         this.subtype.add("Eldrazi");
         this.subtype.add("Hippogriff");
         this.power = new MageInt(3);
         this.toughness = new MageInt(4);
 
-        // Emerge {5}{U}
+        // Emerge {5}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's converted mana cost.)
         this.addAbility(new EmergeAbility(this, new ManaCostsImpl<>("{5}{U}")));
 
         // When you cast Wretched Gryff, draw a card.
         this.addAbility(new CastSourceTriggeredAbility(new DrawCardSourceControllerEffect(1)));
-        
+
         // Flying
         this.addAbility(FlyingAbility.getInstance());
     }

Mage.Tests/src/test/java/org/mage/test/cards/abilities/keywords/EmergeTest.java

@@ -0,0 +1,66 @@
+/*
+ *  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 org.mage.test.cards.abilities.keywords;
+
+import mage.constants.PhaseStep;
+import mage.constants.Zone;
+import org.junit.Test;
+import org.mage.test.serverside.base.CardTestPlayerBase;
+
+/**
+ *
+ * @author LevelX2
+ */
+public class EmergeTest extends CardTestPlayerBase {
+
+    /**
+     * Wretched Gryff is bugged. I could not use its Emerge ability. Clicking on
+     * the card did not give me the interaction menu.
+     */
+    @Test
+    public void testCastWithEmerge() {
+
+        addCard(Zone.BATTLEFIELD, playerA, "Island", 4);
+        // Emerge {5}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's converted mana cost.)
+        // When you cast Wretched Gryff, draw a card.
+        // Flying
+        addCard(Zone.HAND, playerA, "Wretched Gryff"); // Creature
+
+        addCard(Zone.BATTLEFIELD, playerA, "Silvercoat Lion", 1);
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Wretched Gryff with emerge");
+        setChoice(playerA, "Silvercoat Lion");
+
+        setStopAt(1, PhaseStep.BEGIN_COMBAT);
+        execute();
+
+        assertGraveyardCount(playerA, "Silvercoat Lion", 1);
+        assertPermanentCount(playerA, "Wretched Gryff", 1);
+    }
+
+}

Mage/src/main/java/mage/abilities/ActivatedAbility.java

@@ -24,11 +24,11 @@
 * 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;
 
 import java.util.UUID;
+import mage.abilities.mana.ManaOptions;
 import mage.game.Game;
 
 /**
@@ -38,20 +38,30 @@ import mage.game.Game;
 public interface ActivatedAbility extends Ability {
 
     boolean canActivate(UUID playerId, Game game);
-    
+
+    /**
+     * Returns the minimal possible cost for what the ability can be activated
+     * or cast
+     *
+     * @param playerId
+     * @param game
+     * @return
+     */
+    ManaOptions getMinimumCostToActivate(UUID playerId, Game game);
+
     /**
      * Creates a fresh copy of this activated ability.
-     * 
+     *
      * @return A new copy of this ability.
      */
     @Override
-    ActivatedAbility copy();   
+    ActivatedAbility copy();
-    
+
     /**
-     * Set a flag to know, that the ability is only created adn used to check 
+     * Set a flag to know, that the ability is only created adn used to check
      * what's playbable for the player.
      */
     void setCheckPlayableMode();
-    
+
     boolean isCheckPlayableMode();
 }

Mage/src/main/java/mage/abilities/ActivatedAbilityImpl.java

@@ -34,6 +34,7 @@ import mage.abilities.costs.mana.ManaCosts;
 import mage.abilities.costs.mana.PhyrexianManaCost;
 import mage.abilities.effects.Effect;
 import mage.abilities.effects.Effects;
+import mage.abilities.mana.ManaOptions;
 import mage.cards.Card;
 import mage.constants.AbilityType;
 import mage.constants.AsThoughEffectType;
@@ -199,6 +200,11 @@ public abstract class ActivatedAbilityImpl extends AbilityImpl implements Activa
         return false;
     }
 
+    @Override
+    public ManaOptions getMinimumCostToActivate(UUID playerId, Game game) {
+        return getManaCostsToPay().getOptions();
+    }
+
     protected boolean controlsAbility(UUID playerId, Game game) {
         if (this.controllerId != null && this.controllerId.equals(playerId)) {
             return true;

Mage/src/main/java/mage/abilities/keyword/EmergeAbility.java

@@ -28,10 +28,12 @@
 package mage.abilities.keyword;
 
 import java.util.UUID;
+import mage.Mana;
 import mage.abilities.SpellAbility;
 import mage.abilities.costs.common.SacrificeTargetCost;
 import mage.abilities.costs.mana.ManaCost;
 import mage.abilities.costs.mana.ManaCosts;
+import mage.abilities.mana.ManaOptions;
 import mage.cards.Card;
 import mage.constants.Outcome;
 import mage.constants.SpellAbilityType;
@@ -84,6 +86,26 @@ public class EmergeAbility extends SpellAbility {
         return false;
     }
 
+    @Override
+    public ManaOptions getMinimumCostToActivate(UUID playerId, Game game) {
+        int maxCMC = 0;
+        for (Permanent creature : game.getBattlefield().getActivePermanents(new FilterControlledCreaturePermanent(), playerId, this.getSourceId(), game)) {
+            int cmc = creature.getConvertedManaCost();
+            if (cmc > maxCMC) {
+                maxCMC = cmc;
+            }
+        }
+        ManaOptions manaOptions = super.getMinimumCostToActivate(playerId, game);
+        for (Mana mana : manaOptions) {
+            if (mana.getGeneric() > maxCMC) {
+                mana.setGeneric(mana.getGeneric() - maxCMC);
+            } else {
+                mana.setGeneric(0);
+            }
+        }
+        return manaOptions;
+    }
+
     @Override
     public boolean activate(Game game, boolean noMana) {
         Player controller = game.getPlayer(this.getControllerId());

Mage/src/main/java/mage/players/PlayerImpl.java

@@ -2489,7 +2489,7 @@ public abstract class PlayerImpl implements Player, Serializable {
                 canBeCastRegularly = false;
             }
             if (canBeCastRegularly) {
-                ManaOptions abilityOptions = copy.getManaCostsToPay().getOptions();
+                ManaOptions abilityOptions = copy.getMinimumCostToActivate(playerId, game);
                 if (abilityOptions.isEmpty()) {
                     return true;
                 } else {