Nissa tends to be a lands-matter kind of Planeswalker, with most of her cards doing things like untapping lands (Genesis Mage, Sage Animist, Vital Force, Steward of Elements, and Worldwaker), animating them into creatures (Vital Force, Sage Animist, Shadowed Boughs, Steward of Elements), or giving you extra abilities whenever you play a land
Anytime you cast a Pegasus, Unicorn, or Horse spell, you get to copy that card
The deck starts by casting a number of efficiently-costed creatures, many with strong secondary abilities that help accelerate out your powerful mid-game threats including Llanowar Loamspeaker (acceleration) and Floriferous Vinewall (land fetch)
Then when opposing stuff dies, if their toughness was less than 1, you draw that card
Its controller may search his or her library for a basic land card, put that card onto the battlefield tapped, then shuffle his or her library
Unfortunately for anyone looking to open these packs, this also means big price tags get attached to them