Nissa, Vastwood Seer SDCC 2015 EXCLUSIVE [San Diego Comic-Con 2015]

When Nissa, Vastwood Seer enters the battlefield, you may search your library for a basic Forest card, reveal it, put it into your hand, then shuffle your library. Whenever a land enters the battlefield under your control, if you control seven or more lands, exile Nissa, then return her to the battlefield transformed under her owner's control.

+1: Reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand. −2: Create Ashaya, the Awoken World, a legendary 4/4 green Elemental creature token. −7: Untap up to six target lands. They become 6/6 Elemental creatures. They're still lands.