Name:Aetherstream Leopard
ManaCost:2 G
Types:Creature Cat
PT:2/3
K:Trample
T:Mode$ ChangesZone | Origin$ Any | Destination$ Battlefield | ValidCard$ Card.Self | Execute$ TrigEnergy | TriggerDescription$ When CARDNAME enters the battlefield, you get {E} (an energy counter).
SVar:TrigEnergy:DB$ PutCounter | Defined$ You | CounterType$ ENERGY | CounterNum$ 1
T:Mode$ Attacks | ValidCard$ Card.Self | Execute$ TrigPump | TriggerDescription$ Whenever CARDNAME attacks, you may pay {E}. If you do, it gets +2/+0 until end of turn.
SVar:TrigPump:AB$ Pump | Cost$ PayEnergy<1> | Defined$ Self | NumAtt$ +2
SVar:HasAttackEffect:TRUE 
SVar:Picture:http://www.wizards.com/global/images/magic/general/aetherstream_leopard.jpg
Oracle:Trample\nWhen Aetherstream Leopard enters the battlefield, you get {E} (an energy counter).\nWhenever Aetherstream Leopard attacks, you may pay {E}. If you do, it gets +2/+0 until end of turn.