replace groovy code with ability in card script

release/Magarena/scripts/Hibernation_Sliver.groovy

@@ -1,40 +0,0 @@
-
-def HibernationBounce = new MagicPermanentActivation(
-    new MagicActivationHints(MagicTiming.Removal),
-    "Bounce"
-) {
-
-    @Override
-    public Iterable<MagicEvent> getCostEvent(final MagicPermanent source) {
-        return [new MagicPayLifeEvent(source,2)];
-    }
-
-    @Override
-    public MagicEvent getPermanentEvent(final MagicPermanent source,final MagicPayedCost payedCost) {
-        return new MagicEvent(
-            source,
-            this,
-            "Return SN to its owner's hand."
-        );
-    }
-
-    @Override
-    public void executeEvent(final MagicGame game, final MagicEvent event) {         
-        game.doAction(new MagicRemoveFromPlayAction(
-            event.getPermanent(),
-            MagicLocationType.OwnersHand
-        ));
-    }
-};
-
-[
-    new MagicStatic(
-        MagicLayer.Ability,
-        MagicTargetFilter.TARGET_SLIVER
-    ) {
-        @Override
-        public void modAbilityFlags(final MagicPermanent source,final MagicPermanent permanent,final Set<MagicAbility> flags) {    
-            permanent.addAbility(HibernationBounce);
-        }
-    }
-]

release/Magarena/scripts/Hibernation_Sliver.txt

@@ -7,6 +7,6 @@ type=Creature
 subtype=Sliver
 cost={U}{B}
 pt=2/2
-timing=main
+ability=lord all slivers have pay {L2} Return SN to its owner's hand.
 static=all
-requires_groovy_code
+timing=main

src/magic/model/event/MagicPermanentActivation.java

@@ -139,6 +139,8 @@ public abstract class MagicPermanentActivation extends MagicActivation<MagicPerm
                         events.add(new MagicUntapEvent(source));
                     } else if (cost.equals("{L1}")) {
                         events.add(new MagicPayLifeEvent(source, 1));
+                    } else if (cost.equals("{L2}")) {
+                        events.add(new MagicPayLifeEvent(source, 2));
                     } else if (cost.equals("{L7}")) {
                         events.add(new MagicPayLifeEvent(source, 7));
                     } else if (cost.equals("{+1/+1}")) {