diff --git a/Mage.Sets/src/mage/cards/h/HiddenPredators.java b/Mage.Sets/src/mage/cards/h/HiddenPredators.java
index f5ff50d09b3..88f532926e3 100644
--- a/Mage.Sets/src/mage/cards/h/HiddenPredators.java
+++ b/Mage.Sets/src/mage/cards/h/HiddenPredators.java
@@ -71,7 +71,10 @@ class HiddenPredatorsStateTriggeredAbility extends StateTriggeredAbility {
 
     @Override
     public boolean checkInterveningIfClause(Game game) {
-        return this.getSourcePermanentIfItStillExists(game).getCardType().contains(CardType.ENCHANTMENT);
+        if (getSourcePermanentIfItStillExists(game) != null) {
+            return getSourcePermanentIfItStillExists(game).isEnchantment();
+        }
+        return false;
     }
 
     @Override
diff --git a/Mage.Sets/src/mage/cards/l/LurkingJackals.java b/Mage.Sets/src/mage/cards/l/LurkingJackals.java
index 2ff584e5a7e..4822bb2c2de 100644
--- a/Mage.Sets/src/mage/cards/l/LurkingJackals.java
+++ b/Mage.Sets/src/mage/cards/l/LurkingJackals.java
@@ -54,15 +54,22 @@ class LurkingJackalsStateTriggeredAbility extends StateTriggeredAbility {
 
     @Override
     public boolean checkTrigger(GameEvent event, Game game) {
-        if (game.getOpponents(getControllerId()).stream().anyMatch((playerId) -> (game.getPlayer(playerId).getLife() <= 10))) {
-            return true;
+        if (game.getOpponents(getControllerId()) != null) {
+            for (UUID opponentId : game.getOpponents(getControllerId())) {
+                if (game.getPlayer(opponentId).getLife() <= 10) {
+                    return true;
+                }
+            }
         }
         return false;
     }
 
     @Override
     public boolean checkInterveningIfClause(Game game) {
-        return this.getSourcePermanentIfItStillExists(game).getCardType().contains(CardType.ENCHANTMENT);
+        if (getSourcePermanentIfItStillExists(game) != null) {
+            return getSourcePermanentIfItStillExists(game).isEnchantment();
+        }
+        return false;
     }
 
     @Override
diff --git a/Mage.Sets/src/mage/cards/o/OpalAvenger.java b/Mage.Sets/src/mage/cards/o/OpalAvenger.java
index 5586cbedf6e..cc28e074245 100644
--- a/Mage.Sets/src/mage/cards/o/OpalAvenger.java
+++ b/Mage.Sets/src/mage/cards/o/OpalAvenger.java
@@ -54,12 +54,18 @@ class OpalAvengerStateTriggeredAbility extends StateTriggeredAbility {
 
     @Override
     public boolean checkTrigger(GameEvent event, Game game) {
-        return game.getState().getPlayer(getControllerId()).getLife() <= 10;
+        if (game.getState().getPlayer(getControllerId()) != null) {
+            return game.getState().getPlayer(getControllerId()).getLife() <= 10;
+        }
+        return false;
     }
 
     @Override
     public boolean checkInterveningIfClause(Game game) {
-        return this.getSourcePermanentIfItStillExists(game).getCardType().contains(CardType.ENCHANTMENT);
+        if (getSourcePermanentIfItStillExists(game) != null) {
+            return getSourcePermanentIfItStillExists(game).isEnchantment();
+        }
+        return false;
     }
 
     @Override
diff --git a/Mage.Sets/src/mage/cards/v/VeiledCrocodile.java b/Mage.Sets/src/mage/cards/v/VeiledCrocodile.java
index c3790e5c738..860795598af 100644
--- a/Mage.Sets/src/mage/cards/v/VeiledCrocodile.java
+++ b/Mage.Sets/src/mage/cards/v/VeiledCrocodile.java
@@ -67,7 +67,10 @@ class VeiledCrocodileStateTriggeredAbility extends StateTriggeredAbility {
 
     @Override
     public boolean checkInterveningIfClause(Game game) {
-        return this.getSourcePermanentIfItStillExists(game).getCardType().contains(CardType.ENCHANTMENT);
+        if (getSourcePermanentIfItStillExists(game) != null) {
+            return getSourcePermanentIfItStillExists(game).isEnchantment();
+        }
+        return false;
     }
 
     @Override