Maybe if it destroyed seven creatures per swing I could see it, but for now, this is a flavor win and nothing more
Vivi Ornitier's effect is so good, and can be copied onto other creatures (something Izzet Cauldron decks do in Standard), so they too can provide mana to make for explosive turns where you can play your entire hand and draw a bunch of cards
Now, I want to turn your attention to an upcoming Disney Lorcana event
The most highly prized among the collection is the Enchanted Rare variant of Aurora, Dreaming Guardian, a Sapphire card from The First Chapter that sees Aurora conjuring powers in her sleep
Although we ourselves at Wizards had strong perspectives on the series, we didn't want to get too tunnel-visioned and sought out a variety of resources to determine which characters were most popular among a broader array of FINAL FANTASY fans