diff --git a/Mage.Sets/src/mage/sets/invasion/Firescreamer.java b/Mage.Sets/src/mage/sets/invasion/Firescreamer.java
index 98c387416a..b4dead2a56 100644
--- a/Mage.Sets/src/mage/sets/invasion/Firescreamer.java
+++ b/Mage.Sets/src/mage/sets/invasion/Firescreamer.java
@@ -33,8 +33,10 @@ import mage.abilities.common.SimpleActivatedAbility;
 import mage.abilities.costs.mana.ManaCostsImpl;
 import mage.abilities.effects.common.ReturnToHandSourceEffect;
 import mage.abilities.effects.common.continious.BoostEnchantedEffect;
+import mage.abilities.effects.common.continious.BoostSourceEffect;
 import mage.cards.CardImpl;
 import mage.constants.CardType;
+import mage.constants.Duration;
 import mage.constants.Rarity;
 import mage.constants.Zone;
 
@@ -52,7 +54,7 @@ public class Firescreamer extends CardImpl {
         this.toughness = new MageInt(2);
 
         // {R}: Firescreamer gets +1/+0 until end of turn.
-        this.addAbility(new SimpleActivatedAbility(Zone.BATTLEFIELD, new BoostEnchantedEffect(+1, 0), new ManaCostsImpl("{R}")));
+        this.addAbility(new SimpleActivatedAbility(Zone.BATTLEFIELD, new BoostSourceEffect(1,0, Duration.EndOfTurn), new ManaCostsImpl("{R}")));
     }
 
     public Firescreamer(final Firescreamer card) {
diff --git a/Mage.Sets/src/mage/sets/invasion/SerpentineKavu.java b/Mage.Sets/src/mage/sets/invasion/SerpentineKavu.java
index a27842cf65..e56c119c8a 100644
--- a/Mage.Sets/src/mage/sets/invasion/SerpentineKavu.java
+++ b/Mage.Sets/src/mage/sets/invasion/SerpentineKavu.java
@@ -29,9 +29,15 @@ package mage.sets.invasion;
 
 import java.util.UUID;
 import mage.MageInt;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.effects.common.continious.GainAbilitySourceEffect;
+import mage.abilities.keyword.HasteAbility;
 import mage.cards.CardImpl;
 import mage.constants.CardType;
+import mage.constants.Duration;
 import mage.constants.Rarity;
+import mage.constants.Zone;
 
 /**
  *
@@ -47,6 +53,7 @@ public class SerpentineKavu extends CardImpl {
         this.toughness = new MageInt(4);
 
         // {R}: Serpentine Kavu gains haste until end of turn.
+        this.addAbility(new SimpleActivatedAbility(Zone.BATTLEFIELD, new GainAbilitySourceEffect(HasteAbility.getInstance(), Duration.EndOfTurn), new ManaCostsImpl("{R}")));
     }
 
     public SerpentineKavu(final SerpentineKavu card) {