Groot, Flora Colossus

Reach, trample
{x}{g}, Sacrifice Groot, Flora Colossus: Regenerate X creatures. If you do, return Groot, Flora Colossus to the battlefield transformed under its owner's control.
{g}{g}: Regenerate Groot, Flora Colossus. If you
do, exile Groot, Flora Colossus and return it to
the battlefield transformed under its owner's control.
"I AM GROOT!"