- [XLN] Planeswalker uniqueness no longer matters ( http://magic.wizards.com/en/articles/archive/feature/ixalan-mechanics ), planeswalkers are Legendary instead.

forge-game/src/main/java/forge/game/GameAction.java

@@ -973,9 +973,10 @@ public class GameAction {
                     checkAgain = true;
                 }
 
+                /* -- As of Ixalan, planeswalker uniqueness is only established via the Legendary rule
                 if (handlePlaneswalkerRule(p)) {
                     checkAgain = true;
-                }
+                }*/
             }
             // 704.5m World rule
             checkAgain |= handleWorldRule();