diff --git a/res/cardsfolder/b/brontotherium.txt b/res/cardsfolder/b/brontotherium.txt
index 2e89a85a675..6b969906857 100644
--- a/res/cardsfolder/b/brontotherium.txt
+++ b/res/cardsfolder/b/brontotherium.txt
@@ -1,13 +1,12 @@
-Name:Brontotherium
-ManaCost:4 G G
-Types:Creature Beast
-Text:no text
-PT:5/3
-K:Trample
-K:Provoke
-SVar:RemAIDeck:True
-SVar:Rarity:Uncommon
-SVar:Picture:http://www.wizards.com/global/images/magic/general/brontotherium.jpg
-SetInfo:LGN|Uncommon|http://magiccards.info/scans/en/le/119.jpg
-Oracle:Trample\nProvoke (When this attacks, you may have target creature defending player controls untap and block it if able.)
+Name:Brontotherium
+ManaCost:4 G G
+Types:Creature Beast
+Text:no text
+PT:5/3
+K:Trample
+K:Provoke
+SVar:Rarity:Uncommon
+SVar:Picture:http://www.wizards.com/global/images/magic/general/brontotherium.jpg
+SetInfo:LGN|Uncommon|http://magiccards.info/scans/en/le/119.jpg
+Oracle:Trample\nProvoke (When this attacks, you may have target creature defending player controls untap and block it if able.)
 End
\ No newline at end of file
diff --git a/res/cardsfolder/c/crested_craghorn.txt b/res/cardsfolder/c/crested_craghorn.txt
index fb11d36fcf6..ce8cc3ce964 100644
--- a/res/cardsfolder/c/crested_craghorn.txt
+++ b/res/cardsfolder/c/crested_craghorn.txt
@@ -1,13 +1,13 @@
-Name:Crested Craghorn
-ManaCost:4 R
-Types:Creature Goat Beast
-Text:no text
-PT:4/1
-K:Haste
-K:Provoke
-SVar:RemAIDeck:True
-SVar:Rarity:Common
-SVar:Picture:http://www.wizards.com/global/images/magic/general/crested_craghorn.jpg
-SetInfo:LGN|Common|http://magiccards.info/scans/en/le/91.jpg
-Oracle:Haste\nProvoke (When this attacks, you may have target creature defending player controls untap and block it if able.)
+Name:Crested Craghorn
+ManaCost:4 R
+Types:Creature Goat Beast
+Text:no text
+PT:4/1
+K:Haste
+K:Provoke
+SVar:RemAIDeck:True
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/crested_craghorn.jpg
+SetInfo:LGN|Common|http://magiccards.info/scans/en/le/91.jpg
+Oracle:Haste\nProvoke (When this attacks, you may have target creature defending player controls untap and block it if able.)
 End
\ No newline at end of file
diff --git a/res/cardsfolder/k/krosan_vorine.txt b/res/cardsfolder/k/krosan_vorine.txt
index 38b5323ff44..387fec070cd 100644
--- a/res/cardsfolder/k/krosan_vorine.txt
+++ b/res/cardsfolder/k/krosan_vorine.txt
@@ -5,7 +5,6 @@ Text:no text
 PT:3/2
 K:Provoke
 K:CARDNAME can't be blocked by more than one creature.
-SVar:RemAIDeck:True
 SVar:Rarity:Common
 SVar:Picture:http://www.wizards.com/global/images/magic/general/krosan_vorine.jpg
 SetInfo:LGN|Common|http://magiccards.info/scans/en/le/131.jpg
diff --git a/res/cardsfolder/l/lowland_tracker.txt b/res/cardsfolder/l/lowland_tracker.txt
index 70a92013560..a34c8ca3a8d 100644
--- a/res/cardsfolder/l/lowland_tracker.txt
+++ b/res/cardsfolder/l/lowland_tracker.txt
@@ -1,13 +1,12 @@
-Name:Lowland Tracker
-ManaCost:4 W
-Types:Creature Human Soldier
-Text:no text
-PT:2/2
-K:First Strike
-K:Provoke
-SVar:RemAIDeck:True
-SVar:Rarity:Common
-SVar:Picture:http://www.wizards.com/global/images/magic/general/lowland_tracker.jpg
-SetInfo:LGN|Common|http://magiccards.info/scans/en/le/17.jpg
-Oracle:First strike\nProvoke (When this attacks, you may have target creature defending player controls untap and block it if able.)
+Name:Lowland Tracker
+ManaCost:4 W
+Types:Creature Human Soldier
+Text:no text
+PT:2/2
+K:First Strike
+K:Provoke
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/lowland_tracker.jpg
+SetInfo:LGN|Common|http://magiccards.info/scans/en/le/17.jpg
+Oracle:First strike\nProvoke (When this attacks, you may have target creature defending player controls untap and block it if able.)
 End
\ No newline at end of file
diff --git a/src/main/java/forge/CombatUtil.java b/src/main/java/forge/CombatUtil.java
index 6902ee0ec16..daddc4f0303 100644
--- a/src/main/java/forge/CombatUtil.java
+++ b/src/main/java/forge/CombatUtil.java
@@ -285,11 +285,11 @@ public class CombatUtil {
         attackersWithLure = attackersWithLure.getKeyword("All creatures able to block CARDNAME do so.");
 
         for (Card attacker : attackersWithLure) {
-            if (canBlock(blocker, combat) && canBlock(attacker, blocker)) return true;
+            if (canBeBlocked(attacker, combat) && canBlock(attacker, blocker)) return true;
         }
         
         for (Card attacker : blocker.getMustBlockCards()) {
-            if (canBlock(blocker, combat) && canBlock(attacker, blocker)) return true;
+            if (canBeBlocked(attacker, combat) && canBlock(attacker, blocker)) return true;
         }
 
         return false;
diff --git a/src/main/java/forge/card/abilityFactory/AbilityFactory_Combat.java b/src/main/java/forge/card/abilityFactory/AbilityFactory_Combat.java
index 3fd8da5b8aa..1508122c171 100644
--- a/src/main/java/forge/card/abilityFactory/AbilityFactory_Combat.java
+++ b/src/main/java/forge/card/abilityFactory/AbilityFactory_Combat.java
@@ -874,7 +874,7 @@ public final class AbilityFactory_Combat {
                 if (blocker == null)
                     return false;
                 abTgt.addTarget(CardFactoryUtil.AI_getBestCreature(list));
-                chance = false; //TODO:change this to true, once the human input takes mustblocks into account
+                chance = true; //TODO:change this to true, once the human input takes mustblocks into account
             }
         } else
             return false;
diff --git a/src/main/java/forge/card/abilityFactory/AbilityFactory_PermanentState.java b/src/main/java/forge/card/abilityFactory/AbilityFactory_PermanentState.java
index 178f8519dfb..ecd564b0448 100644
--- a/src/main/java/forge/card/abilityFactory/AbilityFactory_PermanentState.java
+++ b/src/main/java/forge/card/abilityFactory/AbilityFactory_PermanentState.java
@@ -226,7 +226,7 @@ public class AbilityFactory_PermanentState {
 
             // TODO: use Defined to determine, if this is an unfavorable result
             ArrayList<Card> pDefined = AbilityFactory.getDefinedCards(sa.getSourceCard(), params.get("Defined"), sa);
-            if (pDefined != null && pDefined.get(0).isUntapped())
+            if (pDefined != null && pDefined.get(0).isUntapped() && pDefined.get(0).getController().isComputer())
                 return false;
 
             return true;
diff --git a/src/main/java/forge/gui/game/CardDetailPanel.java b/src/main/java/forge/gui/game/CardDetailPanel.java
index 1173b9a74ea..e8d9cda3bdb 100644
--- a/src/main/java/forge/gui/game/CardDetailPanel.java
+++ b/src/main/java/forge/gui/game/CardDetailPanel.java
@@ -340,6 +340,12 @@ public class CardDetailPanel extends JPanel implements CardContainer {
             if (area.length() != 0) area.append("\n");
             area.append("This card can't be cast.");
         }
+        
+        //must block
+        if (!card.getMustBlockCards().isEmpty()) {
+            if (area.length() != 0) area.append("\n");
+            area.append("Must block an attacker");
+        }
 
         if (card.hasAttachedCardsByMindsDesire()) {
             if (area.length() != 0) area.append("\n");