Name:Riparian Tiger
ManaCost:3 G G
Types:Creature Cat
PT:4/4
K:Trample
T:Mode$ ChangesZone | Origin$ Any | Destination$ Battlefield | ValidCard$ Card.Self | Execute$ TrigEnergy | TriggerDescription$ When CARDNAME enters the battlefield, you get {E}{E} (two energy counters).
SVar:TrigEnergy:DB$ PutCounter | Defined$ You | CounterType$ ENERGY | CounterNum$ 2
T:Mode$ Attacks | ValidCard$ Card.Self | Execute$ TrigPump | TriggerDescription$ Whenever CARDNAME attacks, you may pay {E}{E}. If you do, it gets +2/+2 until end of turn.
SVar:TrigPump:AB$ Pump | Cost$ PayEnergy<2> | Defined$ Self | NumAtt$ +2 | NumDef$ +2
SVar:HasAttackEffect:TRUE 
SVar:Picture:http://www.wizards.com/global/images/magic/general/riparian_tiger.jpg
Oracle:Trample\nWhen Riparian Tiger enters the battlefield, you get {E}{E} (two energy counters).\nWhenever Riparian Tiger attacks, you may pay {E}{E}. If you do, it gets +2/+2 until end of turn.