Nissa, Worldwaker is a mythic Legendary Planeswalker — Nissa card from San Diego Comic-Con 2014 (PS14), collector number 187. Current market price: — (foil $44.49), TCGplayer market prices via Scryfall.
+1: Target land you control becomes a 4/4 Elemental creature with trample. It's still a land. +1: Untap up to four target Forests. −7: Search your library for any number of basic land cards, put them onto the battlefield, then shuffle. Those lands become 4/4 Elemental creatures with trample. They're still lands.