implement bronze horse. added IsTargetingSource property.

.gitattributes

@@ -1348,6 +1348,7 @@ res/cardsfolder/b/broken_fall.txt svneol=native#text/plain
 res/cardsfolder/b/broken_visage.txt svneol=native#text/plain
 res/cardsfolder/b/brontotherium.txt -text
 res/cardsfolder/b/bronze_bombshell.txt -text
+res/cardsfolder/b/bronze_horse.txt -text
 res/cardsfolder/b/bronzebeak_moa.txt -text
 res/cardsfolder/b/brood_birthing.txt svneol=native#text/plain
 res/cardsfolder/b/brood_of_cockroaches.txt svneol=native#text/plain

res/cardsfolder/b/bronze_horse.txt

@@ -0,0 +1,13 @@
+Name:Bronze Horse
+ManaCost:7
+Types:Artifact Creature Horse
+PT:4/4
+K:Trample
+S:Mode$ Continuous | Affected$ Card.Self | AddKeyword$ PreventAllDamageBy Spell.IsTargetingSource | CheckSVar$ X | SVarCompare$ GE1 | Description$ Prevent all damage that would be dealt to CARDNAME by spells that target it.
+SVar:X:Count$Valid Creature.YouCtrl+Other
+SVar:BuffedBy:Creature
+SVar:Picture:http://www.wizards.com/global/images/magic/general/bronze_horse.jpg
+Oracle:Trample\nAs long as you control another creature, prevent all damage that would be dealt to Bronze Horse by spells that target it.
+SetInfo:LEG Rare
+SetInfo:CHN Rare
+SetInfo:TSB Uncommon

src/main/java/forge/Card.java

@@ -5615,6 +5615,18 @@ public class Card extends GameEntity implements Comparable<Card> {
             if (!this.dealtDamageToThisTurn.containsKey(source)) {
                 return false;
             }
+        } else if (property.startsWith("IsTargetingSource")) {
+            for (final SpellAbility sa : this.getCharacteristics().getSpellAbility()) {
+                final SpellAbility saTargeting = sa.getSATargetingCard();
+                if (saTargeting != null) {
+                    for (final Card c : saTargeting.getTarget().getTargetCards()) {
+                        if (c.equals(source)) {
+                            return true;
+                        }
+                    }
+                }
+            }
+            return false;
         } else if (property.startsWith("SharesColorWith")) {
             if (property.equals("SharesColorWith")) {
                 if (!this.sharesColorWith(source)) {