Renamed attachCard => attachCardByMindsDesire because it's the only way the field is uses. Hope someone will refactor the whole spell.

src/main/java/forge/Card.java

@@ -49,7 +49,7 @@ public class Card extends GameEntity implements Comparable<Card> {
     //Hidden keywords won't be displayed on the card
     private ArrayList<String> hiddenExtrinsicKeyword = new ArrayList<String>();
     private ArrayList<String> prevIntrinsicKeyword = new ArrayList<String>();
-    private ArrayList<Card> attached = new ArrayList<Card>();
+    private ArrayList<Card> attachedByMindsDesire = new ArrayList<Card>();
     //which equipment cards are equipping this card?
     private ArrayList<Card> equippedBy = new ArrayList<Card>();
     //equipping size will always be 0 or 1
@@ -3174,9 +3174,9 @@ public class Card extends GameEntity implements Comparable<Card> {
      *
      * @return an array of {@link forge.Card} objects.
      */
-    public final Card[] getAttachedCards() {
+    public final Card[] getAttachedCardsByMindsDesire() {
-        Card[] c = new Card[attached.size()];
+        Card[] c = new Card[attachedByMindsDesire.size()];
-        attached.toArray(c);
+        attachedByMindsDesire.toArray(c);
         return c;
     }
 
@@ -3185,8 +3185,8 @@ public class Card extends GameEntity implements Comparable<Card> {
      *
      * @return a boolean.
      */
-    public final boolean hasAttachedCards() {
+    public final boolean hasAttachedCardsByMindsDesire() {
-        return getAttachedCards().length != 0;
+        return getAttachedCardsByMindsDesire().length != 0;
     }
 
     /**
@@ -3194,8 +3194,8 @@ public class Card extends GameEntity implements Comparable<Card> {
      *
      * @param c a {@link forge.Card} object.
      */
-    public final void attachCard(final Card c) {
+    public final void attachCardByMindsDesire(final Card c) {
-        attached.add(c);
+        attachedByMindsDesire.add(c);
         this.updateObservers();
     }
 
@@ -3204,8 +3204,8 @@ public class Card extends GameEntity implements Comparable<Card> {
      *
      * @param c a {@link forge.Card} object.
      */
-    public final void unattachCard(final Card c) {
+    public final void unattachCardByMindDesire(final Card c) {
-        attached.remove(c);
+        attachedByMindsDesire.remove(c);
         this.updateObservers();
     }
 

src/main/java/forge/GameAction.java

@@ -32,6 +32,7 @@ import forge.properties.NewConstants.LANG.GameAction.GAMEACTION_TEXT;
 import forge.quest.gui.main.QuestChallenge;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map.Entry;
@@ -1530,12 +1531,12 @@ public class GameAction {
      * @param c a {@link forge.Card} object.
      * @return a boolean.
      */
-    public final boolean isAttachee(final Card c) {
+    public final boolean isAttacheeByMindsDesire(final Card c) {
         CardList list = AllZoneUtil.getCardsIn(Zone.Battlefield);
 
         for (int i = 0; i < list.size(); i++) {
-            CardList check = new CardList(list.getCard(i).getAttachedCards());
+            Card [] cc = list.getCard(i).getAttachedCardsByMindsDesire();
-            if (check.contains(c)) {
+            if (Arrays.binarySearch(cc, c) >= 0) {
                 return true;
             }
         }

src/main/java/forge/GuiDisplayUtil.java

@@ -277,7 +277,7 @@ public final class GuiDisplayUtil implements NewConstants {
         for (int i = 0; i < c.length; i++) {
             if ((!(c[i].isCreature() || c[i].isEnchantment() || c[i].isArtifact() || c[i].isPlaneswalker())
                     || (c[i].isLand() && c[i].isArtifact() && !c[i].isCreature() && !c[i].isEnchantment()))
-                    && !AllZone.getGameAction().isAttachee(c[i])
+                    && !AllZone.getGameAction().isAttacheeByMindsDesire(c[i])
                     || (c[i].getName().startsWith("Mox") && !c[i].getName().equals("Mox Diamond")))
             {
                 a.add(c[i]);

src/main/java/forge/card/cardFactory/CardFactory_Sorceries.java

@@ -267,10 +267,10 @@ public class CardFactory_Sorceries {
                     Player player = card.getController();
                     PlayerZone play = player.getZone(Constant.Zone.Battlefield);
                     PlayerZone RFG = player.getZone(Constant.Zone.Exile);
-                    Card[] Attached = card.getAttachedCards();
+                    Card[] Attached = card.getAttachedCardsByMindsDesire();
                     RFG.remove(Attached[0]);
                     play.add(Attached[0]);
-                    card.unattachCard(Attached[0]);
+                    card.unattachCardByMindDesire(Attached[0]);
                 }//resolve()
             };//SpellAbility
 
@@ -282,7 +282,7 @@ public class CardFactory_Sorceries {
                     Card c = null;
                     Player player = card.getController();
                     if (player.isHuman()) {
-                        Card[] Attached = getSourceCard().getAttachedCards();
+                        Card[] Attached = getSourceCard().getAttachedCardsByMindsDesire();
                         Card[] Choices = new Card[Attached.length];
                         boolean SystemsGo = true;
                         if (AllZone.getStack().size() > 0) {
@@ -334,17 +334,17 @@ public class CardFactory_Sorceries {
                                     }
                                     // Clear Attached List
                                     for (int i = 0; i < Attached.length; i++) {
-                                        card.unattachCard(Attached[i]);
+                                        card.unattachCardByMindDesire(Attached[i]);
                                     }
                                     // Re-add
                                     for (int i = 0; i < ReAttach.length; i++) {
-                                        if (ReAttach[i] != null) card.attachCard(ReAttach[i]);
+                                        if (ReAttach[i] != null) card.attachCardByMindsDesire(ReAttach[i]);
                                     }
                                     target.addSpellAbility(PlayCreature);
                                     AllZone.getStack().add(PlayCreature);
                                 } else {
                                     AllZone.getGameAction().playCardNoCost(c);
-                                    card.unattachCard(c);
+                                    card.unattachCardByMindDesire(c);
                                 }
                             } else
                                 JOptionPane.showMessageDialog(null, "Player cancelled or there is no more cards available on Mind's Desire.", "", JOptionPane.INFORMATION_MESSAGE);
@@ -382,7 +382,7 @@ public class CardFactory_Sorceries {
                         c = libList.get(0);
                         PlayerZone RFG = player.getZone(Constant.Zone.Exile);
                         AllZone.getGameAction().moveTo(RFG, c);
-                        Minds_D.attachCard(c);
+                        Minds_D.attachCardByMindsDesire(c);
                     }
                     final Card Minds = card;
                     //	AllZone.getGameAction().exile(Minds);

src/main/java/forge/gui/game/CardDetailPanel.java

@@ -337,9 +337,9 @@ public class CardDetailPanel extends JPanel implements CardContainer {
             area.append("This card can't be cast.");
         }
 
-        if (card.hasAttachedCards()) {
+        if (card.hasAttachedCardsByMindsDesire()) {
             if (area.length() != 0) area.append("\n");
-            Card[] cards = card.getAttachedCards();
+            Card[] cards = card.getAttachedCardsByMindsDesire();
             area.append("=Attached: ");
             for (Card c : cards) {
                 area.append(c.getName());