- Put the NPE guard back in.

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

@@ -298,9 +298,11 @@ public class CardView extends GameEntityView {
         StringBuilder sb = new StringBuilder();
         sb.append("\r\nRemembered: \r\n");
         for (final Object o : c.getRemembered()) {
+            if (o != null) {
                 sb.append(o.toString());
                 sb.append("\r\n");
             }
+        }
         set(TrackableProperty.Remembered, sb.toString());
     }