This is an incredibly popular archetype, and The Grand Creators has tons of cards new and old that will go nicely with it
Ob Nixilis, Captive Kingpin Most of the burn damage is done in one damage increments
It can also be used as a resource management system where a Pokemon will be knocked out, and you want to make use of its Energy elsewhere before it goes
Among main decks of Izzet Prowess builds specifically, 6 players are running four copies, 75 are running three copies, 32 are running two copies, 8 are running one copy, and 19 are running no copies of Vivi Ornitier
The Family Matters deck also has a control sub-theme to it that gives it strong staying power
Yuriko is a prime example of this, able to come down for just two mana if you get through with just one creature in combat