Nissa, Vastwood Seer // Nissa, Sage Animist

Legendary Creature — Elf Scout - (mythic)

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