diff --git a/forge-game/src/main/java/forge/game/ability/effects/AlterAttributeEffect.java b/forge-game/src/main/java/forge/game/ability/effects/AlterAttributeEffect.java
index 79ad1993dc2..14ae5d11caf 100644
--- a/forge-game/src/main/java/forge/game/ability/effects/AlterAttributeEffect.java
+++ b/forge-game/src/main/java/forge/game/ability/effects/AlterAttributeEffect.java
@@ -46,6 +46,9 @@ public class AlterAttributeEffect extends SpellAbilityEffect {
                 boolean altered = false;
 
                 switch (attr.trim()) {
+                    case "Harnessed":
+                        altered = gameCard.setHarnessed(activate);
+                        break;
                     case "Plotted":
                         altered = gameCard.setPlotted(activate);
 
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 9b883eab92b..92cc9a09a39 100644
--- a/forge-game/src/main/java/forge/game/card/Card.java
+++ b/forge-game/src/main/java/forge/game/card/Card.java
@@ -203,6 +203,7 @@ public class Card extends GameEntity implements Comparable<Card>, IHasSVars, ITr
     private boolean unearthed;
     private boolean ringbearer;
     private boolean monstrous;
+    private boolean harnessed;
     private boolean renowned;
     private boolean solved;
     private boolean tributed;
@@ -2969,6 +2970,9 @@ public class Card extends GameEntity implements Comparable<Card>, IHasSVars, ITr
         if (monstrous) {
             sb.append("Monstrous\r\n");
         }
+        if (harnessed) {
+            sb.append("Harnessed\r\n");
+        }
         if (renowned) {
             sb.append("Renowned\r\n");
         }
@@ -6693,6 +6697,14 @@ public class Card extends GameEntity implements Comparable<Card>, IHasSVars, ITr
         setRingBearer(false);
     }
 
+    public final boolean isHarnessed() {
+        return harnessed;
+    }
+    public final boolean setHarnessed(final boolean harnessed0) {
+        harnessed = harnessed0;
+        return true;
+    }
+
     public final boolean isMonstrous() {
         return monstrous;
     }
diff --git a/forge-game/src/main/java/forge/game/card/CardProperty.java b/forge-game/src/main/java/forge/game/card/CardProperty.java
index 33594fb3033..4e68c95a771 100644
--- a/forge-game/src/main/java/forge/game/card/CardProperty.java
+++ b/forge-game/src/main/java/forge/game/card/CardProperty.java
@@ -1828,6 +1828,10 @@ public class CardProperty {
             if (card.getDevouredCards().isEmpty()) {
                 return false;
             }
+        } else if (property.equals("harnessed")) {
+            if (!card.isHarnessed()) {
+                return false;
+            }
         } else if (property.equals("IsMonstrous")) {
             if (!card.isMonstrous()) {
                 return false;
diff --git a/forge-gui/res/cardsfolder/upcoming/the_soul_stone.txt b/forge-gui/res/cardsfolder/upcoming/the_soul_stone.txt
new file mode 100644
index 00000000000..e283c979dcd
--- /dev/null
+++ b/forge-gui/res/cardsfolder/upcoming/the_soul_stone.txt
@@ -0,0 +1,9 @@
+Name:The Soul Stone
+ManaCost:1 B
+Types:Legendary Artifact Infinity Stone
+K:Indestructible
+A:AB$ AlterAttribute | Cost$ 6 B Exile<1/Creature> | Defined$ Self | Attributes$ Harnessed | StackDescription$ SpellDescription | SpellDescription$ Harness CARDNAME. (Once harnessed, its ∞ ability is active.)
+T:Mode$ Phase | Phase$ Upkeep | ValidPlayer$ You | IsPresent$ Card.Self+harnessed | TriggerZones$ Battlefield | Execute$ TrigReturn | TriggerDescription$ ∞ — At the beginning of your upkeep, return target creature card from your graveyard to the battlefield.
+SVar:TrigReturn:DB$ Changezone | ValidTgts$ Creature.YouOwn | Origin$ Graveyard | Destination$ Battlefield
+DeckHints:Ability$Graveyard
+Oracle:Indestructible\n{T}: Add {B}.\n{6}{B}, {T}, Exile a creature you control: Harness The Soul Stone. (Once harnessed, its ∞ ability is active.)\n∞ — At the beginning of your upkeep, return target creature card from your graveyard to the battlefield.
diff --git a/forge-gui/res/lists/TypeLists.txt b/forge-gui/res/lists/TypeLists.txt
index 2f6adb4fe83..89fabc6c904 100644
--- a/forge-gui/res/lists/TypeLists.txt
+++ b/forge-gui/res/lists/TypeLists.txt
@@ -368,12 +368,14 @@ Food:Foods
 Fortification
 Gold
 Incubator:Incubators
+Infinity
 Junk
 Key:Keys
 Lander:Landers
 Map
 Powerstone:Powerstones
 Spacecraft:Spacecraft
+Stone:Stones
 Treasure:Treasures
 Vehicle:Vehicles
 [WalkerTypes]