Name:Treetop Defense
ManaCost:1 G
Types:Instant
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 Creature.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.)