Fixed that Haste effects given to Obzedat on enters the battlefield stayed after going back to hand and recasting of it.

Mage/src/mage/abilities/effects/common/continious/GainAbilitySourceEffect.java

@@ -109,6 +109,9 @@ public class GainAbilitySourceEffect extends ContinuousEffectImpl<GainAbilitySou
                 permanent.addAbility(ability, source.getSourceId(), game);
                 return true;
             }
+            if (duration.equals(Duration.Custom)) {
+                this.discard();
+            }            
         }
         return false;
     }