Choose a Background (You can have a Background as a second commander.) Legendary Creature - Elf Shaman Noble Heritage Commander creatures you own have "When this creature enters and at the beginning of your upkeep, each player may put two +1/+1 counters on a creature they control
In this case, you can return a land card from your graveyard to your hand, deal one damage to any target and give yourself the ability to recast instants and sorceries in your graveyard
If you've played or lost to Greasefang you'd know the rat pilot is not the deadly side, it's the vehicle she brings out
The Herald will need some way to cheat it into play, whether its reanimation or similar, but its effect can be game breaking if youve a way to protect it
So, aside from being powerful in its own right, Vivi Ornitier has a lot of support that you can use to create a very effective spellslinger deck
As long as you kill your opponent fast enough, it wont matter if they get a couple of extra lands