Mal Endred, Realm Watcher

Forestwalker: (This creature can't be blocked as long
as defending player controls a Forest.)
{g}, {t}: Search your library for a basic land card,
put it onto the battlefield tapped, then shuffle
your library.
{g}{g}{g}, {t}: Mal Endred gets +X/+X and gains
trample until end of turn, where X is the number
of basic land cards you control.