Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)
When Yavimaya Dryad enters the battlefield, you may search your library for a Forest card, put it onto the battlefield tapped under target player's control, then shuffle.
In a multiplayer game, if you leave the game, the Forest you own leaves as well. If instead another player who received your Forest from Yavimaya Dryad leaves the game, that land is exiled.
You can be the target of Yavimaya Dryad’s triggered ability.