With both of its abilities synergizing excellently with each other, there's very little room for improvement for a 3-mana creature like Vivi Ornitier
Jumpstart booster packs are loaded with cards from throughout Magic The Gathering (MTG) history plus 37 cards that get their first-ever printing and dozens of cards from Core Set 2021 (M21) #14: Commander Legends: Battle for Baldurs Gate I dont know if expectations for Commander Legends 2 were too high or if the release schedule was too tight between this and Double Masters 2022
Plus, in a ramp deck (which Green often is, cough, cough) you'll be able to cast big fat stuff like Lifeblood Hydra that can potentially free-cast pretty much anything you reveal
That means she reduces any damage being dealt to her by 1 point per Knight you have on your side, which surely means were going to see some Knight-focused decks in the meta, taking advantage of this excellent ability
Masters sets are always in the conversation for being the best, between the insane reprints and the higher power level make it an easy choice for this category