Turtwig

Evolve (Whenever another 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.)
At the beginning of your upkeep, if Turtwig's
power is 4 or greater, you may sacrifice it. If you
do, search your library for a card named Grotle
and put it in your hand. Then shuffle your
library.