Still, Sivitris -3 is a Sarkhan's Triumph and the -7 threatens a one-sided Crux of Fate, so theres enough synergy to make it work if you can find the blue and black dragons to tie it all together
In multicolor decks, black typically plays a support color role offering creature removal to colors that dont have access to it like blue and green
And, of those four precons, the best one by far was Necron Dynasties , a mono-black precon headed by Szarekh, the Silent KingSzarekh, the Silent King
Remedy that with equipment or Concordant Crossroads, and you have a self-reliant (yet unselfish) one-card milling machine
And now since Leo has a card himself and is essentially Multiversal canon, it might be time to break out the red string and pushpins
Not only do these cards provide absurd amounts of value, but as long as they're in play, their controllers will be required to continuously ask the rest of the table if they'll pay the card at hand's tax when applicable