2gLegendary Creature - Elf Scout

When Nissa, Vastwood Seer enters the battlefield, you may search your library for a basic Forest card, reveal it, and 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 onto the battlefield transformed under her owner's control.

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