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
Beyond that, the Disassemble ability is pretty interesting and could be helpful if the Lorcana meta gets to be too out of hand with items
(1) During your Main Phase: You can destroy 1 card in your hand, and if you do, add 1 Nephthys monster from your Deck to your hand, except Prayer of Nephthys
Providence of Night fixes that problem by serving as a unique Commander for Brawl
Several players, such as u/warcaptain, for instance, highlighted how Tarkir would probably be my favorite if it wasnt black and white. Similarly, u/djsoren19 lauded the appeal of another surprisingly disliked treatment: Ravnicas