Beorn, the Skin-Changer

When Beorn, the Skin-Changer enters the battlefield, search your library for a basic land card, reveal it and add it to your hand, then shuffle.
{2}{g}{g}: Beorn, the Skin-Changer loses all other types and becomes a green Bear
with base power and toughness 4/4 and gains trample until end of turn.