Widdle Birdie (revisited)

Flying
{g}{t} Widdle Birdie (revisited) gets +1/+0 and Trample until end of turn
{g}{g}{t} Choose target creature. Widdle Birdie (revisited) fights that creature
Every turn Widdle birdie (revisited) does not attack
or fight a creature, put a -1/-1 counter on Widdle Birdie
Whenever Widdle Birdie (revisited) attacks or fights a creature, remove a -1/-1 counter from Widdle Birdie

Aww! What a cute bird!
-last words of many birdwatchers