Evolving Hydra

Landfall — Whenever a land enters the
battlefield under your control, this creature
explores. (Reveal the top card of your library. Put
that card into your hand if it's a land. Otherwise, put
a +1/+1 counter on this creature, then put the card
back on top or into your graveyard.)
{t}: Search your library for a basic land card and
put it into your hand.