Batrachian Test Subject

At the beginning of your upkeep, if Batrachian Test Subject has flying, draw a card.
Whenever Batrachian Test Subject attacks, if it has trample, put a +1/+1 counter on it.
{5}{u}{g}: If Batrachian Test Subject has flying, trample, hexproof and reach, you win the game.
"Frogs aren't adapted to fly at all. Wouldn't that be fun, though?"