Leave Me Alone!

Whenever one or more creatures attacks you,
you may reveal the top card of your library. If
the card revealed this way is a land card, you
may put that land in your graveyard and prevent
all combat damage that would be dealt to you
this turn otherwise put that land in your hand.
"Little girl please, put down that axe! I don't care
how much wood you can chop!"
-A really scared treefolk