You have cards that make lots of Vampire tokens (like March of the Canonized, Mavren Fein, Charismatc Conqueror, and Sorin), cards that make Vampires bigger (like Legion Lieutenant, Etchings of the Chosen, and Radiant Destiny), as well as cards to keep your Vampires in play (like Timothar, Kindred Boon, and Dusk Legion Lieutenant)
Expect Secret Lair counterspells, Alchemy cards, and even counterspells from the infamously bonkers 'Un' Magic sets
This card shows that mana dorks that cost two mana usually tap for one mana on their own but offer some additional benefit
Partner (You can have two commanders if both have partner.) Legendary Creature - Spirit Commander (CTRL to add secondary) Draw Keskit, the Flesh Sculptor , Sacrifice three other artifacts and/or creatures: Look at the top three cards of your library
If your deck can support it then there is basically no reason not to include it however assessing when this is the case is trickier business
All your Dragon cards can come down at least one turn earlier, putting you above the curve as far as when players should expect your powerful cards to hit the battlefield