Eevee, Budding Potential

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.)

{w}{w}, Exile Eevee: Search your library for a creature card with mana value equal to the number
of +1/+1 counters on Eevee. Put that card onto the battlefield tapped, then shuffle. At the beginning of the next end step, return Eevee to the battlefield under your control.