- Hopefully a better solution for the LKI problem: add a special flag to show that the card is a temporary copy and should not be considered as being in play

forge-game/src/main/java/forge/game/card/Card.java

@@ -238,6 +238,8 @@ public class Card extends GameEntity implements Comparable<Card> {
     private CardRules cardRules;
     private final CardView view;
 
+    private boolean isTemporaryCopy = false;
+
     // Enumeration for CMC request types
     public enum SplitCMCMode {
         CurrentSideCMC,
@@ -6704,7 +6706,7 @@ public class Card extends GameEntity implements Comparable<Card> {
     }
 
     public boolean isInPlay() {
-        return isInZone(ZoneType.Battlefield);
+        return isInZone(ZoneType.Battlefield) && !isTemporaryCopy;
     }
 
     public void onCleanupPhase(final Player turn) {
@@ -7097,4 +7099,12 @@ public class Card extends GameEntity implements Comparable<Card> {
     public final Collection<Player> getGoaded() {
         return goad.values();
     }
+
+    public final boolean getIsTemporaryCopy() {
+        return this.isTemporaryCopy;
+    }
+
+    public final void setIsTemporaryCopy(boolean temp) {
+        this.isTemporaryCopy = temp;
+    }
 }

forge-game/src/main/java/forge/game/card/CardUtil.java

@@ -323,8 +323,7 @@ public final class CardUtil {
 
         newCopy.setZone(in.getZone());
 
-        // copy the timestamp, necessary for the purpose of triggers that test the timestamp of a LKI-copied card.
+        newCopy.setIsTemporaryCopy(true); // signals that this card should not be considered to be in play
-        newCopy.setTimestamp(in.getTimestamp());
 
         return newCopy;
     }