Nissa's Triumph
Sorcery
Search your library for up to two basic Forest cards. If you control a Nissa planeswalker, instead search your library for up to three land cards. Reveal those cards, put them into your hand, then shuffle your library.
Her triumph came not from destroying the unnatural, but from fostering life.
Illustrated by
War of the Spark#170UncommonEnglishLegality
Rulings
May 3, 2019
Whether you control an appropriate planeswalker is checked only as the spell resolves.
May 3, 2019
Controlling more than one planeswalker of the appropriate type won’t have any more of a benefit than just controlling one.