If you started collecting the cards from Magic: The Gathering, then you can't ignore getting the Vivien deck here. This deck was released in 2019 as part of the Planeswalker Core Set 2020, simply known as Core 2020.
In this deck, you should hold onto these cards: Vivien, Nature's Avenger, Ethereal Elk, Gnarlback Rhino, Vivien's Crocodile, Aggressive Mammoth, and Wakeroot Elemental. In total, there are 60 cards in this deck.
Those who actually play MTG will want to know the colors used in this deck. Actually, there's just one color per deck in Core 2020. For the Vivien deck the color green was chosen.
Vivien, Nature's Avenger Decklist: