* Library of Leng - fixed that it triggers on discarded cards from cost part instead only effect part (#3047);

Mage/src/main/java/mage/game/events/GameEvent.java

@@ -21,6 +21,7 @@ public class GameEvent implements Serializable {
     // flags:
     // for counters: event is result of effect (+1 from planeswalkers is cost, not effect)
     // for combat damage: event is preventable damage
+    // for discard: event is result of effect (1) or result of cost (0)
     protected boolean flag;
     protected String data;
     protected Zone zone;