diff --git a/forge-game/src/main/java/forge/game/replacement/ReplaceProduceMana.java b/forge-game/src/main/java/forge/game/replacement/ReplaceProduceMana.java
index b914ae53b1b..90abfa87fd6 100644
--- a/forge-game/src/main/java/forge/game/replacement/ReplaceProduceMana.java
+++ b/forge-game/src/main/java/forge/game/replacement/ReplaceProduceMana.java
@@ -1,10 +1,14 @@
 package forge.game.replacement;
 
 import forge.game.card.Card;
+import forge.game.card.CardFactoryUtil;
 import forge.game.spellability.SpellAbility;
+import forge.util.Expressions;
 
 import java.util.Map;
 
+import org.apache.commons.lang3.StringUtils;
+
 /** 
  * TODO: Write javadoc for this type.
  *
@@ -37,6 +41,22 @@ public class ReplaceProduceMana extends ReplacementEffect {
             }
         }
 
+        if (hasParam("ManaAmount")) {
+            String full = getParam("ManaAmount");
+            String operator = full.substring(0, 2);
+            String operand = full.substring(2);
+            int intoperand = 0;
+            try {
+                intoperand = Integer.parseInt(operand);
+            } catch (NumberFormatException e) {
+                intoperand = CardFactoryUtil.xCount(getHostCard(), getHostCard().getSVar(operand));
+            }
+            int manaAmount = StringUtils.countMatches((String) runParams.get("Mana"), " ") + 1;
+            if (!Expressions.compare(manaAmount, operator, intoperand)) {
+                return false;
+            }
+        }
+
         if (this.getMapParams().containsKey("ValidCard")) {
             if (!matchesValid(runParams.get("Affected"), this.getMapParams().get("ValidCard").split(","), this.getHostCard())) {
                 return false;
diff --git a/forge-gui/res/cardsfolder/upcoming/damping_sphere.txt b/forge-gui/res/cardsfolder/upcoming/damping_sphere.txt
new file mode 100644
index 00000000000..d3ccff78259
--- /dev/null
+++ b/forge-gui/res/cardsfolder/upcoming/damping_sphere.txt
@@ -0,0 +1,11 @@
+Name:Damping Sphere
+ManaCost:2
+Types:Artifact
+R:Event$ ProduceMana | ActiveZones$ Battlefield | ValidCard$ Land | ManaAmount$ GE2 | ManaReplacement$ ProduceC | Description$ If a land is tapped for mana, it produces {C} instead of any other type and amount.
+SVar:ProduceC:Any->C
+S:Mode$ RaiseCost | Activator$ Player | Type$ Spell | Amount$ X | AffectedAmount$ True | Description$ Each spell a player casts costs {1} more to cast for each other spell that player has cast this turn.
+SVar:X:Count$ThisTurnCast_Card.YouCtrl
+SVar:RemAIDeck:True
+SVar:NonStackingEffect:True
+SVar:Picture:http://www.wizards.com/global/images/magic/general/damping_sphere.jpg
+Oracle:If a land is tapped for two or more mana, it produces {C} instead of any other type and amount.\nEach spell a player casts costs {1} more to cast for each other spell that player has cast this turn.