Arterial Alchemy generates three Blood tokens upon entering the battlefield if you're in a pod of four players
Vivi saw a pretty significant drop-off after this, falling to $47 just before the June Standard bans
On top of this, there are some genuinely great enchantments in the deck that interact with the key mechanics of the deck
Now you know how a sideboard works in MTG, how to build one, and how they vary across formats
You could also use Roaming ThroneRoaming Throne as an extra Scion or Spawn that also doubles Annihilator 1 to Annihilator 2
I removed several Faerie creatures, like Brazen BorrowerBrazen Borrower, Mocking SpriteMocking Sprite, and Nightveil SpriteNightveil Sprite, which aren't necessarily bad cards, they just don't work in our deck