diff --git a/.gitattributes b/.gitattributes
index 24dbdd34b71..d7d9c3093c7 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -4409,6 +4409,7 @@ res/cardsfolder/i/infested_roothold.txt svneol=native#text/plain
 res/cardsfolder/i/infiltrate.txt svneol=native#text/plain
 res/cardsfolder/i/infiltration_lens.txt svneol=native#text/plain
 res/cardsfolder/i/infiltrator_il_kor.txt svneol=native#text/plain
+res/cardsfolder/i/infiltrators_magemark.txt -text
 res/cardsfolder/i/infinite_hourglass.txt -text
 res/cardsfolder/i/inflame.txt svneol=native#text/plain
 res/cardsfolder/i/information_dealer.txt svneol=native#text/plain
diff --git a/res/cardsfolder/i/infiltrators_magemark.txt b/res/cardsfolder/i/infiltrators_magemark.txt
new file mode 100644
index 00000000000..385ab25c36e
--- /dev/null
+++ b/res/cardsfolder/i/infiltrators_magemark.txt
@@ -0,0 +1,12 @@
+Name:Infiltrator's Magemark
+ManaCost:2 U
+Types:Enchantment Aura
+Text:no text
+K:Enchant creature
+A:SP$ Attach | Cost$ 2 U | ValidTgts$ Creature | AILogic$ Pump
+S:Mode$ Continuous | Affected$ Creature.enchanted+YouCtrl | AddPower$ 1 | AddToughness$ 1 | AddHiddenKeyword$ HIDDEN CARDNAME can't be blocked except by creatures with defender. | Description$ Creatures you control that are enchanted get +1/+1 and can't be blocked except by creatures with defender.
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/infiltrators_magemark.jpg
+SetInfo:GPT|Common|http://magiccards.info/scans/en/gp/28.jpg
+Oracle:Enchant creature\nCreatures you control that are enchanted get +1/+1 and can't be blocked except by creatures with defender.
+End
\ No newline at end of file
diff --git a/src/main/java/forge/game/phase/CombatUtil.java b/src/main/java/forge/game/phase/CombatUtil.java
index 1be8f32fdff..87d8b5a80fc 100644
--- a/src/main/java/forge/game/phase/CombatUtil.java
+++ b/src/main/java/forge/game/phase/CombatUtil.java
@@ -678,6 +678,10 @@ public class CombatUtil {
             }
         }
 
+        if (attacker.hasKeyword("CARDNAME can't be blocked except by creatures with defender.") && !blocker.hasKeyword("Defender")) {
+            return false;
+        }
+
         if (attacker.hasKeyword("Horsemanship")) {
             if (!blocker.hasKeyword("Horsemanship")) {
                 return false;