* Fixed a bug if casting split cards from other players e.g with Mindclaw Shaman (fixes #3867).

Mage.Server.Plugins/Mage.Player.AI/src/main/java/mage/player/ai/ComputerPlayer.java

@@ -1514,7 +1514,7 @@ public class ComputerPlayer extends PlayerImpl implements Player {
                 if (object != null) {
                     LinkedHashMap<UUID, ActivatedAbility> useableAbilities = getSpellAbilities(object, game.getState().getZone(object.getId()), game);
                     if (useableAbilities != null && !useableAbilities.isEmpty()) {
-                        game.fireGetChoiceEvent(playerId, name, object, new ArrayList<>(useableAbilities.values()));
+                        // game.fireGetChoiceEvent(playerId, name, object, new ArrayList<>(useableAbilities.values()));
                         // TODO: Improve this
                         return (SpellAbility) useableAbilities.values().iterator().next();
                     }

Mage.Tests/src/test/java/org/mage/test/cards/cost/splitcards/CastSplitCardsFromOtherZonesTest.java

@@ -0,0 +1,127 @@
+/*
+ *  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.cost.splitcards;
+
+import mage.constants.PhaseStep;
+import mage.constants.Zone;
+import org.junit.Test;
+import org.mage.test.serverside.base.CardTestPlayerBase;
+
+/**
+ *
+ * @author LevelX2
+ */
+public class CastSplitCardsFromOtherZonesTest extends CardTestPlayerBase {
+
+    /**
+     * I attempted to cast Wear // Tear from my opponent's hand with Mindclaw
+     * Shaman - the card is selectable, but doesn't do anything at all after it
+     * gets selected to cast. To my best knowledge, Mindclaw Shaman should be
+     * able to cast one side, the other or both (only in the case of Fuse
+     * cards).
+     */
+    @Test
+    public void testCastTearFromOpponentsHand() {
+        addCard(Zone.BATTLEFIELD, playerA, "Mountain", 5);
+        // When Mindclaw Shaman enters the battlefield, target opponent reveals his or her hand.
+        // You may cast an instant or sorcery card from it without paying its mana cost.
+        addCard(Zone.HAND, playerA, "Mindclaw Shaman"); // Creature {4}{R}
+
+        addCard(Zone.BATTLEFIELD, playerB, "Sanguine Bond", 1); // Enchantment to destroy
+        // Wear
+        // Destroy target artifact.
+        // Tear
+        // Destroy target enchantment.
+        addCard(Zone.HAND, playerB, "Wear // Tear"); // Instant {1}{R} // {W}
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Mindclaw Shaman");
+        addTarget(playerA, "Sanguine Bond");
+
+        setStopAt(1, PhaseStep.BEGIN_COMBAT);
+        execute();
+
+        assertPermanentCount(playerA, "Mindclaw Shaman", 1);
+        assertGraveyardCount(playerB, "Wear // Tear", 1);
+        assertGraveyardCount(playerB, "Sanguine Bond", 1);
+
+    }
+
+    @Test
+    public void testCastFearFromOpponentsHand() {
+        addCard(Zone.BATTLEFIELD, playerA, "Mountain", 5);
+        // When Mindclaw Shaman enters the battlefield, target opponent reveals his or her hand.
+        // You may cast an instant or sorcery card from it without paying its mana cost.
+        addCard(Zone.HAND, playerA, "Mindclaw Shaman"); // Creature {4}{R}
+
+        addCard(Zone.BATTLEFIELD, playerB, "Icy Manipulator", 1); // Artifact to destroy
+        // Wear
+        // Destroy target artifact.
+        // Tear
+        // Destroy target enchantment.
+        addCard(Zone.HAND, playerB, "Wear // Tear"); // Instant {1}{R} // {W}
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Mindclaw Shaman");
+        addTarget(playerA, "Icy Manipulator");
+
+        setStopAt(1, PhaseStep.BEGIN_COMBAT);
+        execute();
+
+        assertPermanentCount(playerA, "Mindclaw Shaman", 1);
+        assertGraveyardCount(playerB, "Wear // Tear", 1);
+        assertGraveyardCount(playerB, "Icy Manipulator", 1);
+
+    }
+
+    @Test
+    public void testCastFusedFromOpponentsHand() {
+        addCard(Zone.BATTLEFIELD, playerA, "Mountain", 5);
+        // When Mindclaw Shaman enters the battlefield, target opponent reveals his or her hand.
+        // You may cast an instant or sorcery card from it without paying its mana cost.
+        addCard(Zone.HAND, playerA, "Mindclaw Shaman"); // Creature {4}{R}
+
+        addCard(Zone.BATTLEFIELD, playerB, "Sanguine Bond", 1); // Enchantment to destroy
+        addCard(Zone.BATTLEFIELD, playerB, "Icy Manipulator", 1); // Artifact to destroy
+        // Wear
+        // Destroy target artifact.
+        // Tear
+        // Destroy target enchantment.
+        addCard(Zone.HAND, playerB, "Wear // Tear"); // Instant {1}{R} // {W}
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Mindclaw Shaman");
+        addTarget(playerA, "Sanguine Bond");
+
+        setStopAt(1, PhaseStep.BEGIN_COMBAT);
+        execute();
+
+        assertPermanentCount(playerA, "Mindclaw Shaman", 1);
+        assertGraveyardCount(playerB, "Wear // Tear", 1);
+        assertGraveyardCount(playerB, "Sanguine Bond", 1);
+        assertGraveyardCount(playerB, "Icy Manipulator", 1);
+
+    }
+}

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

@@ -47,6 +47,7 @@ import mage.abilities.effects.common.ManaEffect;
 import mage.abilities.keyword.FlashbackAbility;
 import mage.abilities.mana.ActivatedManaAbilityImpl;
 import mage.cards.Card;
+import mage.cards.SplitCard;
 import mage.constants.*;
 import mage.game.Game;
 import mage.game.command.Emblem;
@@ -886,14 +887,28 @@ public abstract class AbilityImpl implements Ability {
 
     @Override
     public boolean canChooseTarget(Game game) {
+        if (this instanceof SpellAbility) {
+            if (SpellAbilityType.SPLIT_FUSED.equals(((SpellAbility) this).getSpellAbilityType())) {
+                Card card = game.getCard(getSourceId());
+                if (card != null) {
+                    return canChooseTargetAbility(((SplitCard) card).getLeftHalfCard().getSpellAbility(), game, getControllerId())
+                            && canChooseTargetAbility(((SplitCard) card).getRightHalfCard().getSpellAbility(), game, getControllerId());
+                }
+                return false;
+            }
+        }
+        return canChooseTargetAbility(this, game, getControllerId());
+    }
+
+    private static boolean canChooseTargetAbility(Ability ability, Game game, UUID controllerId) {
         int found = 0;
-        for (Mode mode : getModes().values()) {
+        for (Mode mode : ability.getModes().values()) {
-            if (mode.getTargets().canChoose(sourceId, controllerId, game)) {
+            if (mode.getTargets().canChoose(ability.getSourceId(), ability.getControllerId(), game)) {
                 found++;
-                if (getModes().isEachModeMoreThanOnce()) {
+                if (ability.getModes().isEachModeMoreThanOnce()) {
                     return true;
                 }
-                if (found >= getModes().getMinModes()) {
+                if (found >= ability.getModes().getMinModes()) {
                     return true;
                 }
             }

Mage/src/main/java/mage/cards/SplitCard.java

@@ -119,6 +119,8 @@ public abstract class SplitCard extends CardImpl {
             case SPLIT_RIGHT:
                 return this.getRightHalfCard().cast(game, fromZone, ability, controllerId);
             default:
+                this.getLeftHalfCard().getSpellAbility().setControllerId(controllerId);
+                this.getRightHalfCard().getSpellAbility().setControllerId(controllerId);
                 return super.cast(game, fromZone, ability, controllerId);
         }
     }

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

@@ -966,6 +966,7 @@ public abstract class PlayerImpl implements Player, Serializable {
         if (game == null || ability == null) {
             return false;
         }
+        ability.setControllerId(getId());
         if (ability.getSpellAbilityType() != SpellAbilityType.BASE) {
             ability = chooseSpellAbilityForCast(ability, game, noMana);
         }
@@ -1241,24 +1242,37 @@ public abstract class PlayerImpl implements Player, Serializable {
         LinkedHashMap<UUID, ActivatedAbility> useable = new LinkedHashMap<>();
         for (Ability ability : object.getAbilities()) {
             if (ability instanceof SpellAbility) {
-                if (((SpellAbility) ability).getSpellAbilityType() == SpellAbilityType.SPLIT_FUSED) {
+                switch (((SpellAbility) ability).getSpellAbilityType()) {
+                    case SPLIT_FUSED:
                         if (zone == Zone.HAND) {
-                        // Fix so you don't need to choose Fuse twice
+                            if (((SpellAbility) ability).canChooseTarget(game)) {
-                        useable.clear();
                                 useable.put(ability.getId(), (SpellAbility) ability);
+                            }
+                        }
+                    case SPLIT:
+                        if (((SplitCard) object).getLeftHalfCard().getSpellAbility().canChooseTarget(game)) {
+                            useable.put(((SplitCard) object).getLeftHalfCard().getSpellAbility().getId(), ((SplitCard) object).getLeftHalfCard().getSpellAbility());
+                        }
+                        if (((SplitCard) object).getRightHalfCard().getSpellAbility().canChooseTarget(game)) {
+                            useable.put(((SplitCard) object).getRightHalfCard().getSpellAbility().getId(), ((SplitCard) object).getRightHalfCard().getSpellAbility());
+                        }
                         return useable;
+                    case SPLIT_AFTERMATH:
+                        if (zone == Zone.GRAVEYARD) {
+                            if (((SplitCard) object).getRightHalfCard().getSpellAbility().canChooseTarget(game)) {
+                                useable.put(((SplitCard) object).getRightHalfCard().getSpellAbility().getId(), ((SplitCard) object).getRightHalfCard().getSpellAbility());
+                            }
                         } else {
-                        // Fuse only allowed from hand
+                            if (((SplitCard) object).getLeftHalfCard().getSpellAbility().canChooseTarget(game)) {
-                        continue;
+                                useable.put(((SplitCard) object).getLeftHalfCard().getSpellAbility().getId(), ((SplitCard) object).getLeftHalfCard().getSpellAbility());
                             }
                         }
-                if (((SpellAbility) ability).getSpellAbilityType() == SpellAbilityType.SPLIT
+                        return useable;
-                        || ((SpellAbility) ability).getSpellAbilityType() == SpellAbilityType.SPLIT_AFTERMATH) {
+                    default:
-                    continue;
-                }
                         useable.put(ability.getId(), (SpellAbility) ability);
                 }
             }
+        }
         return useable;
     }