diff --git a/forge-game/src/main/java/forge/game/ability/AbilityUtils.java b/forge-game/src/main/java/forge/game/ability/AbilityUtils.java
index e9e9473696d..e4449e60b0a 100644
--- a/forge-game/src/main/java/forge/game/ability/AbilityUtils.java
+++ b/forge-game/src/main/java/forge/game/ability/AbilityUtils.java
@@ -486,6 +486,13 @@ public class AbilityUtils {
             }
             return CardFactoryUtil.playerXCount(players, calcX[1], card) * multiplier;
         }
+        if (calcX[0].startsWith("ThisTargetedPlayer")) {
+            final ArrayList<Player> players = new ArrayList<Player>();
+            if (null != ability) {
+                Iterables.addAll(players, ability.getTargets().getTargetPlayers());
+            }
+            return CardFactoryUtil.playerXCount(players, calcX[1], card) * multiplier;
+        }
         if (calcX[0].startsWith("TargetedObjects")) {
             final List<GameObject> objects = new ArrayList<GameObject>();
             // Make list of all targeted objects starting with the root SpellAbility
diff --git a/forge-gui/res/cardsfolder/b/biomantic_mastery.txt b/forge-gui/res/cardsfolder/b/biomantic_mastery.txt
index 597533c9936..c3ea1fcb233 100644
--- a/forge-gui/res/cardsfolder/b/biomantic_mastery.txt
+++ b/forge-gui/res/cardsfolder/b/biomantic_mastery.txt
@@ -1,7 +1,8 @@
 Name:Biomantic Mastery
 ManaCost:4 GU GU GU
 Types:Sorcery
-A:SP$ Draw | Cost$ 4 GU GU GU | NumCards$ X | References$ X | SpellDescription$ Draw a card for each creature target player controls, then draw a card for each creature another target player controls.
-SVar:X:Count$TypeOnBattlefield.Creature
+A:SP$ Draw | Cost$ 4 GU GU GU | Defined$ You | ValidTgts$ Player | NumCards$ X | References$ X | SubAbility$ DBDraw | SpellDescription$ Draw a card for each creature target player controls, then draw a card for each creature another target player controls.
+SVar:DBDraw:DB$ Draw | Defined$ You | ValidTgts$ Player | TargetUnique$ True | NumCards$ X | References$ X
+SVar:X:ThisTargetedPlayer$Valid Creature.YouCtrl
 SVar:Picture:http://www.wizards.com/global/images/magic/general/biomantic_mastery.jpg
 Oracle:({G/U} can be paid with either {G} or {U}.)\nDraw a card for each creature target player controls, then draw a card for each creature another target player controls.
\ No newline at end of file