Keep him on the board long enough, and Vivi becomes a powerful attacker in his own right, but his real value lies in the win conditions you can create with the killer combination of free mana and pinging
You can build a Cycling deck many ways, but the first goal of any Cycling deck is always the same: put down either Fluctuator or New Perspectives, making the vast majority of your cycling cards free to cycle
Any time I see the birds popping up in Modern, I immediately resleeve my playset
Its not good enough to build a whole snow zombie deck around it
Iron Hands ex Pokmon | Scarlet & Violet: Paradox Rift Variants Holo Play
There are also plenty of ways to deal damage to your own creatures, either with direct damage spells, or cards like Forerunner of the Empire