diff --git a/forge-gui/res/cardsfolder/t/treetop_defense.txt b/forge-gui/res/cardsfolder/t/treetop_defense.txt
index 76a6494ea26..1bbfaac7cf6 100644
--- a/forge-gui/res/cardsfolder/t/treetop_defense.txt
+++ b/forge-gui/res/cardsfolder/t/treetop_defense.txt
@@ -1,7 +1,8 @@
 Name:Treetop Defense
-ManaCost:G
+ManaCost:1 G
 Types:Instant
-A:SP$ PumpAll | Cost$ G | ValidCards$ Creature.YouCtrl | KW$ Reach | OpponentTurn$ True | ActivationPhases$ Declare Attackers | SpellDescription$ Cast CARDNAME only during the declare attackers step and only if you've been attacked this step. Creatures you control gain reach until end of turn.
+A:SP$ PumpAll | Cost$ 1 G | ValidCards$ Creature.YouCtrl | KW$ Reach | CheckSVar$ X | SVarCompare$ GE1 | References$ X | OpponentTurn$ True | ActivationPhases$ Declare Attackers | SpellDescription$ Cast CARDNAME only during the declare attackers step and only if you've been attacked this step. Creatures you control gain reach until end of turn.
+SVar:X:Count$Valid Creauture.attackingYou
 SVar:RemAIDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/treetop_defense.jpg
 Oracle:Cast Treetop Defense only during the declare attackers step and only if you've been attacked this step.\nCreatures you control gain reach until end of turn. (They can block creatures with flying.)
\ No newline at end of file