diff --git a/forge-ai/src/main/java/forge/ai/ComputerUtil.java b/forge-ai/src/main/java/forge/ai/ComputerUtil.java
index 387d4a83e07..304c825596c 100644
--- a/forge-ai/src/main/java/forge/ai/ComputerUtil.java
+++ b/forge-ai/src/main/java/forge/ai/ComputerUtil.java
@@ -2809,7 +2809,7 @@ public class ComputerUtil {
                 || type.is(CounterEnumType.GOLD) || type.is(CounterEnumType.MUSIC) || type.is(CounterEnumType.PUPA)
                 || type.is(CounterEnumType.PARALYZATION) || type.is(CounterEnumType.SHELL) || type.is(CounterEnumType.SLEEP)
                 || type.is(CounterEnumType.SLUMBER) || type.is(CounterEnumType.SLEIGHT) || type.is(CounterEnumType.WAGE)
-                || type.is(CounterEnumType.INCARNATION) || type.is(CounterEnumType.RUST);
+                || type.is(CounterEnumType.INCARNATION) || type.is(CounterEnumType.RUST) || type.is(CounterEnumType.STUN);
     }
 
     // this countertypes has no effect
diff --git a/forge-game/src/main/java/forge/game/card/Card.java b/forge-game/src/main/java/forge/game/card/Card.java
index eab8afa5f4e..fe29ac14162 100644
--- a/forge-game/src/main/java/forge/game/card/Card.java
+++ b/forge-game/src/main/java/forge/game/card/Card.java
@@ -334,6 +334,7 @@ public class Card extends GameEntity implements Comparable<Card>, IHasSVars {
 
     private ReplacementEffect shieldCounterReplaceDamage = null;
     private ReplacementEffect shieldCounterReplaceDestroy = null;
+    private ReplacementEffect stunCounterReplaceUntap = null;
 
     // Enumeration for CMC request types
     public enum SplitCMCMode {
@@ -6100,16 +6101,16 @@ public class Card extends GameEntity implements Comparable<Card>, IHasSVars {
         }
 
         // Shield Counter aren't affected by Changed Card Traits
-        if (this.getCounters(CounterEnumType.SHIELD) > 0) {
+        if (getCounters(CounterEnumType.SHIELD) > 0) {
             String sa = "DB$ RemoveCounter | Defined$ Self | CounterType$ Shield | CounterNum$ 1";
             if (shieldCounterReplaceDamage == null) {
-                String reStr = "Event$ DamageDone | ActiveZones$ Battlefield | ValidTarget$ Card.Self | PreventionEffect$ True | AlwaysReplace$ True "
+                String reStr = "Event$ DamageDone | ActiveZones$ Battlefield | ValidTarget$ Card.Self | PreventionEffect$ True | AlwaysReplace$ True | Secondary$ True "
             + "| Description$ If damage would be dealt to this permanent, prevent that damage and remove a shield counter from it.";
                 shieldCounterReplaceDamage = ReplacementHandler.parseReplacement(reStr, this, false, null);
                 shieldCounterReplaceDamage.setOverridingAbility(AbilityFactory.getAbility(sa, this));
             }
             if (shieldCounterReplaceDestroy == null) {
-                String reStr = "Event$ Destroy | ActiveZones$ Battlefield | ValidCard$ Card.Self | ValidSource$ SpellAbility "
+                String reStr = "Event$ Destroy | ActiveZones$ Battlefield | ValidCard$ Card.Self | ValidSource$ SpellAbility | Secondary$ True "
             + "| Description$ If this permanent would be destroyed as the result of an effect, instead remove a shield counter from it.";
                 shieldCounterReplaceDestroy = ReplacementHandler.parseReplacement(reStr, this, false, null);
                 shieldCounterReplaceDestroy.setOverridingAbility(AbilityFactory.getAbility(sa, this));
@@ -6118,6 +6119,17 @@ public class Card extends GameEntity implements Comparable<Card>, IHasSVars {
             list.add(shieldCounterReplaceDamage);
             list.add(shieldCounterReplaceDestroy);
         }
+        if (getCounters(CounterEnumType.STUN) > 0) {
+            String sa = "DB$ RemoveCounter | Defined$ Self | CounterType$ Stun | CounterNum$ 1";
+            if (stunCounterReplaceUntap == null) {
+                String reStr = "Event$ Untap | ActiveZones$ Battlefield | ValidCard$ Card.Self  | Secondary$ True "
+            + "| Description$ If this permanent would become untapped, instead remove a stun counter from it.";
+
+                stunCounterReplaceUntap = ReplacementHandler.parseReplacement(reStr, this, false, null);
+                stunCounterReplaceUntap.setOverridingAbility(AbilityFactory.getAbility(sa, this));
+            }
+            list.add(stunCounterReplaceUntap);
+        }
     }
 
     public boolean hasReplacementEffect(final ReplacementEffect re) {
diff --git a/forge-game/src/main/java/forge/game/card/CounterEnumType.java b/forge-game/src/main/java/forge/game/card/CounterEnumType.java
index 6bd9a2fb41b..ab66a3ab70f 100644
--- a/forge-game/src/main/java/forge/game/card/CounterEnumType.java
+++ b/forge-game/src/main/java/forge/game/card/CounterEnumType.java
@@ -329,6 +329,8 @@ public enum CounterEnumType {
 
     STUDY("STUDY", 226, 192, 165),
 
+    STUN("STUN", 226, 192, 165),
+
     TASK("TASK", 191, 63, 49),
 
     THEFT("THEFT", 255, 176, 125),
diff --git a/forge-gui/res/cardsfolder/upcoming/impede_momentum.txt b/forge-gui/res/cardsfolder/upcoming/impede_momentum.txt
new file mode 100644
index 00000000000..0e3cbe0989a
--- /dev/null
+++ b/forge-gui/res/cardsfolder/upcoming/impede_momentum.txt
@@ -0,0 +1,8 @@
+Name:Impede Momentum
+ManaCost:1 U
+Types:Sorcery
+A:SP$ Tap | TgtPrompt$ Choose target creature | ValidTgts$ Creature | SubAbility$ DBCounter | SpellDescription$ Tap target creature and put three stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
+SVar:DBCounter:DB$ PutCounter | Defined$ Targeted | CounterType$ Stun | CounterNum$ 3 | SubAbility$ DBScry
+SVar:DBScry:DB$ Scry | ScryNum$ 1 | SpellDescription$ Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)
+DeckHints:Ability$Counters
+Oracle:Tap target creature and put three stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)\nScry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)