added SecondSpellCastThisTurn property. added Second Guess

.gitattributes

@@ -7929,6 +7929,7 @@ res/cardsfolder/s/seat_of_the_synod.txt svneol=native#text/plain
 res/cardsfolder/s/secluded_glen.txt svneol=native#text/plain
 res/cardsfolder/s/secluded_steppe.txt svneol=native#text/plain
 res/cardsfolder/s/second_chance.txt svneol=native#text/plain
+res/cardsfolder/s/second_guess.txt -text
 res/cardsfolder/s/second_sight.txt svneol=native#text/plain
 res/cardsfolder/s/second_sunrise.txt -text
 res/cardsfolder/s/second_thoughts.txt svneol=native#text/plain

res/cardsfolder/s/second_guess.txt

@@ -0,0 +1,10 @@
+Name:Second Guess
+ManaCost:1 U
+Types:Instant
+Text:no text
+A:SP$ Counter | Cost$ 1 U | TargetType$ Spell | TgtPrompt$ Select second spell cast this turn. | ValidTgts$ Spell.SecondSpellCastThisTurn | SpellDescription$ Counter target spell that's the second spell cast this turn.
+SVar:Rarity:Uncommon
+SVar:Picture:http://www.wizards.com/global/images/magic/general/second_guess.jpg
+SetInfo:AVR|Uncommon|http://magiccards.info/scans/en/avr/74.jpg
+Oracle:Counter target spell that's the second spell cast this turn.
+End

src/main/java/forge/Card.java

@@ -6707,6 +6707,15 @@ public class Card extends GameEntity implements Comparable<Card> {
                 }
             }
 
+        } else if (property.startsWith("SecondSpellCastThisTurn")) {
+            final CardList list = CardUtil.getThisTurnCast("Card", source);
+            if (list.size() < 2)  {
+                return false;
+            }
+            else if (list.get(1) != this) {
+                return false;
+            }
+
         } else if (property.startsWith("sharesTypeWith")) {
             if (!this.sharesTypeWith(source)) {
                 return false;