* Added logic to remove control effects that refer to permanents of a player that leaves the game.

Mage.Tests/src/test/java/org/mage/test/multiplayer/PlayerLeftGameTest.java

@@ -0,0 +1,144 @@
+/*
+ *  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.multiplayer;
+
+import java.io.FileNotFoundException;
+import mage.constants.MultiplayerAttackOption;
+import mage.constants.PhaseStep;
+import mage.constants.RangeOfInfluence;
+import mage.constants.Zone;
+import mage.game.FreeForAll;
+import mage.game.Game;
+import mage.game.GameException;
+import org.junit.Test;
+import org.mage.test.serverside.base.CardTestMultiPlayerBase;
+
+/**
+ *
+ * @author LevelX2
+ */
+public class PlayerLeftGameTest extends CardTestMultiPlayerBase {
+
+    @Override
+    protected Game createNewGameAndPlayers() throws GameException, FileNotFoundException {
+        Game game = new FreeForAll(MultiplayerAttackOption.MULTIPLE, RangeOfInfluence.ALL, 0, 2);
+        // Player order: A -> D -> C -> B
+        playerA = createPlayer(game, playerA, "PlayerA");
+        playerB = createPlayer(game, playerB, "PlayerB");
+        playerC = createPlayer(game, playerC, "PlayerC");
+        playerD = createPlayer(game, playerD, "PlayerD");
+        return game;
+    }
+
+    /**
+     * Tests Enchantment to control other permanent
+     */
+    @Test
+    public void TestControlledByEnchantment() {
+        addCard(Zone.BATTLEFIELD, playerC, "Rootwater Commando");
+
+        addCard(Zone.BATTLEFIELD, playerA, "Island", 4);
+        // Enchant creature
+        // You control enchanted creature.
+        addCard(Zone.HAND, playerA, "Control Magic");
+
+        addCard(Zone.BATTLEFIELD, playerD, "Silvercoat Lion");
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Control Magic", "Rootwater Commando");
+
+        attack(2, playerD, "Silvercoat Lion", playerC);
+
+        setStopAt(2, PhaseStep.POSTCOMBAT_MAIN);
+        execute();
+
+        assertLife(playerC, 0);
+        assertPermanentCount(playerC, 0);
+        assertPermanentCount(playerA, "Rootwater Commando", 0);
+        assertGraveyardCount(playerA, "Control Magic", 1);
+
+    }
+
+    /**
+     * Tests Enchantment to control other permanent
+     */
+    @Test
+    public void TestControlledBySorcery() {
+        addCard(Zone.BATTLEFIELD, playerC, "Rootwater Commando");
+
+        addCard(Zone.BATTLEFIELD, playerA, "Island", 4);
+        // Exchange control of target artifact or creature and another target permanent that shares one of those types with it.
+        // (This effect lasts indefinitely.)
+        addCard(Zone.HAND, playerA, "Legerdemain"); // Sorcery
+        addCard(Zone.BATTLEFIELD, playerA, "Wall of Air");
+
+        addCard(Zone.BATTLEFIELD, playerD, "Silvercoat Lion");
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Legerdemain", "Rootwater Commando^Wall of Air");
+
+        attack(2, playerD, "Silvercoat Lion", playerC);
+
+        setStopAt(2, PhaseStep.POSTCOMBAT_MAIN);
+        execute();
+
+        assertLife(playerC, 0);
+        assertGraveyardCount(playerA, "Legerdemain", 1);
+        assertPermanentCount(playerC, 0);
+        assertPermanentCount(playerA, "Rootwater Commando", 0); // Goes to graveyard becuase player C left
+        assertPermanentCount(playerC, "Wall of Air", 0);
+        assertGraveyardCount(playerA, "Wall of Air", 0);
+        assertPermanentCount(playerA, "Wall of Air", 1); // Returned back to player A
+
+    }
+
+    /**
+     * Tests Enchantment to control other permanent
+     */
+    @Test
+    public void TestOtherPlayerControllsCreature() {
+        addCard(Zone.BATTLEFIELD, playerC, "Rootwater Commando");
+
+        addCard(Zone.BATTLEFIELD, playerA, "Mountain", 4);
+        // Untap target nonlegendary creature and gain control of it until end of turn. That creature gains haste until end of turn.
+        addCard(Zone.HAND, playerA, "Blind with Anger"); // Instant
+
+        addCard(Zone.BATTLEFIELD, playerD, "Silvercoat Lion");
+
+        castSpell(2, PhaseStep.PRECOMBAT_MAIN, playerA, "Blind with Anger", "Rootwater Commando");
+
+        attack(2, playerD, "Silvercoat Lion", playerC);
+
+        setStopAt(2, PhaseStep.POSTCOMBAT_MAIN);
+        execute();
+
+        assertLife(playerC, 0);
+        assertGraveyardCount(playerA, "Blind with Anger", 1);
+        assertPermanentCount(playerC, 0);
+        assertPermanentCount(playerA, "Rootwater Commando", 0); // Goes to graveyard becuase player C left
+        assertPermanentCount(playerA, "Rootwater Commando", 0); // Returned back to player A
+    }
+}

Mage/src/main/java/mage/abilities/effects/ContinuousEffects.java

@@ -1066,6 +1066,10 @@ public class ContinuousEffects implements Serializable {
         }
     }
 
+    public HashSet<Ability> getLayeredEffectAbilities(ContinuousEffect effect) {
+        return layeredEffects.getAbility(effect.getId());
+    }
+
     /**
      * Adds a continuous ability with a reference to a sourceId. It's used for
      * effects that cease to exist again So this effects were removed again

Mage/src/main/java/mage/game/GameImpl.java

@@ -72,6 +72,7 @@ import mage.cards.decks.Deck;
 import mage.choices.Choice;
 import mage.constants.CardType;
 import mage.constants.Duration;
+import mage.constants.Layer;
 import mage.constants.MultiplayerAttackOption;
 import mage.constants.Outcome;
 import mage.constants.PhaseStep;
@@ -2321,6 +2322,23 @@ public abstract class GameImpl implements Game, Serializable {
                     perm.removeFromCombat(this, true);
                 }
                 it.remove();
+            } else if (perm.getControllerId().equals(player.getId())) {
+                // and any effects which give that player control of any objects or players end
+                Effects:
+                for (ContinuousEffect effect : getContinuousEffects().getLayeredEffects(this)) {
+                    if (effect.hasLayer(Layer.ControlChangingEffects_2)) {
+                        for (Ability ability : getContinuousEffects().getLayeredEffectAbilities(effect)) {
+                            for (Target target : ability.getTargets()) {
+                                for (UUID targetId : target.getTargets()) {
+                                    if (targetId.equals(perm.getId())) {
+                                        effect.discard();
+                                        continue Effects;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
             }
         }
         // Then, if that player controlled any objects on the stack not represented by cards, those objects cease to exist.
@@ -2332,6 +2350,7 @@ public abstract class GameImpl implements Game, Serializable {
             }
         }
         // Then, if there are any objects still controlled by that player, those objects are exiled.
+        applyEffects(); // to remove control from effects removed meanwhile
         List<Permanent> permanents = this.getBattlefield().getAllActivePermanents(playerId);
         for (Permanent permanent : permanents) {
             permanent.moveToExile(null, "", null, this);