Minor Adventure bug fixes (#3683)

Prevent NPE with invalid event history
Correct transition from aggro to previous movement behavior with dungeon mobs

forge-gui-mobile/src/forge/adventure/character/EnemySprite.java

@@ -361,6 +361,8 @@ public class EnemySprite extends CharacterSprite implements Steerable<Vector2> {
             }
             if (aggro && spriteToPlayer.len() > pursueRange) {
                 aggro = false;
+                if (navPath != null)
+                    navPath.clear();
                 initializeBaseMovementBehavior();
             }
         }

forge-gui-mobile/src/forge/adventure/player/PlayerStatistic.java

@@ -110,8 +110,12 @@ public class PlayerStatistic implements SaveFileContent {
         else
             winLossRecord.clear();
 
-        if (data!=null&&data.containsKey("completedEvents"))
+        if (data!=null&&data.containsKey("completedEvents")) {
             completedEvents = (ArrayList<AdventureEventData>) data.readObject("completedEvents");
+            if (completedEvents == null) {
+                completedEvents = new ArrayList<>();
+            }
+        }
         else
             completedEvents.clear();
     }

forge-gui/res/cardsfolder/d/demonic_lore.txt

@@ -8,3 +8,4 @@ SVar:TrigLoseLife:DB$ LoseLife | LifeAmount$ X
 SVar:X:Count$InYourHand/Times.2
 SVar:DonateMe:5
 Oracle:When Demonic Lore enters the battlefield, draw three cards.\nAt the beginning of your end step, you lose 2 life for each card in your hand.
+AI:Remove:Random