Lachesis, Little Lionheart

Defender
Whenever one or more creatures you
control attack, Lachesis, Little Lionheart
gets a +1/+1 counter.
As long as Lachesis, Little Lionheart has
power 3 or greater, she becomes a Master
Knight, gains Vigilance, Lifelink, and can
attack as though she didn't have Defender.