Trail of Mystery
Trail of Mystery {1}{G}
Whenever a face-down creature enters the battlefield under your control, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle your library.
Whenever a permanent you control is turned face up, if it's a creature, it gets +2/+2 until end of turn.
Latest set: [KTK] Khans of Tarkir ( R · #154 )