Protean Tadpole

Evolve (Whenever a creature enters the battlefield under your control, if that creature
has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
Whenever a creature enters the battlefield under your control, if that creature has flying, Protean Tadpole gains flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, fear, intimidate, vigilance, and reach.