diff --git a/Mage.Sets/src/mage/sets/legions/MistformSliver.java b/Mage.Sets/src/mage/sets/legions/MistformSliver.java
index 3b1674dd068..c956ab5fce5 100644
--- a/Mage.Sets/src/mage/sets/legions/MistformSliver.java
+++ b/Mage.Sets/src/mage/sets/legions/MistformSliver.java
@@ -33,7 +33,9 @@ import mage.abilities.Ability;
 import mage.abilities.common.SimpleActivatedAbility;
 import mage.abilities.common.SimpleStaticAbility;
 import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.effects.ContinuousEffect;
 import mage.abilities.effects.OneShotEffect;
+import mage.abilities.effects.common.continious.AddCardSubTypeTargetEffect;
 import mage.abilities.effects.common.continious.GainAbilityAllEffect;
 import mage.cards.CardImpl;
 import mage.cards.repository.CardRepository;
@@ -48,6 +50,8 @@ import mage.filter.common.FilterCreaturePermanent;
 import mage.game.Game;
 import mage.game.permanent.Permanent;
 import mage.players.Player;
+import mage.target.targetpointer.FixedTarget;
+import mage.util.CardUtil;
 
 /**
  *
@@ -105,9 +109,9 @@ public class MistformSliver extends CardImpl {
                     }
                 }
                 game.informPlayers(permanent.getName() + ": " + player.getName() + " has chosen " + typeChoice.getChoice());
-                game.getState().setValue(permanent.getId() + "_type", typeChoice.getChoice().toString());
-                permanent.addInfo("chosen type", "<i>Chosen type: " + typeChoice.getChoice() + "</i>");
-                permanent.getSubtype().add(typeChoice.getChoice());
+                ContinuousEffect effect = new AddCardSubTypeTargetEffect(typeChoice.getChoice(), Duration.EndOfTurn);
+                effect.setTargetPointer(new FixedTarget(permanent.getId()));
+                game.addEffect(effect, source);
             }
             return false;
         }