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 d2be541192c..d0575e1e793 100644
--- a/forge-game/src/main/java/forge/game/card/CardProperty.java
+++ b/forge-game/src/main/java/forge/game/card/CardProperty.java
@@ -1395,7 +1395,8 @@ public class CardProperty {
                 return false;
             }
         } else if (property.startsWith("power") || property.startsWith("toughness")
-                || property.startsWith("cmc") || property.startsWith("totalPT")) {
+                || property.startsWith("cmc") || property.startsWith("totalPT")
+                || property.startsWith("effectiveToughness")) {
             int x;
             int y = 0;
             String rhs = "";
@@ -1406,6 +1407,9 @@ public class CardProperty {
             } else if (property.startsWith("toughness")) {
                 rhs = property.substring(11);
                 y = card.getNetToughness();
+            } else if (property.startsWith("effectiveToughness")) {
+                rhs = property.substring(20);
+                y = card.getNetToughness() - card.getDamage();
             } else if (property.startsWith("cmc")) {
                 rhs = property.substring(5);
                 y = card.getCMC();
diff --git a/forge-gui/res/cardsfolder/t/tilonallis_crown.txt b/forge-gui/res/cardsfolder/t/tilonallis_crown.txt
index 602db178f0d..6a30dbc3e03 100644
--- a/forge-gui/res/cardsfolder/t/tilonallis_crown.txt
+++ b/forge-gui/res/cardsfolder/t/tilonallis_crown.txt
@@ -2,7 +2,7 @@ Name:Tilonalli's Crown
 ManaCost:1 R
 Types:Enchantment Aura
 K:Enchant creature
-A:SP$ Attach | Cost$ 1 R | ValidTgts$ Creature | AILogic$ Pump | AITgts$ Creature.YouCtrl+toughnessGT1
+A:SP$ Attach | Cost$ 1 R | ValidTgts$ Creature | AILogic$ Pump | AITgts$ Creature.YouCtrl+effectiveToughnessGT1
 T:Mode$ ChangesZone | ValidCard$ Card.Self | Origin$ Any | Destination$ Battlefield | Execute$ TrigDealDamage | TriggerDescription$ When CARDNAME enters the battlefield, it deals 1 damage to enchanted creature.
 SVar:TrigDealDamage:DB$ DealDamage | Defined$ Enchanted | NumDmg$ 1
 S:Mode$ Continuous | Affected$ Creature.EnchantedBy | AddPower$ 3 | AddKeyword$ Trample | Description$ Enchanted creature gets +3/+0 and has trample.