I think somewhere between your early starting point and when youve got the biggest TCG shop in town, you can and often will get lost in a mess of trying to do everything well and quickly so you dont get bad reviews
You can clear the battlefield and then have an enormous flying Bird Goat to do some serious damage with
Thats a lot of graveyard-based strategies to disrupt with your Modern sideboard
While more cards are bound to be confirmed over spoiler season, so far we've seen Castle Dracula (Voldaren Estate), Count Dracula (Sorin the Mirthless, which is getting another version with art by Castlevania's Ayami Kojima), Mina Harker (Thalia, Guardian of Thraben), Sisters of the Undead (Olivia, Crimson Bride), Dracula, Lord Of Blood (Voldaren Bloodcaster), and Abraham Van Helsing (Savior of Ollenbach)
Mono-Black Aggro : A similar removal and discard suite to the devotion deck but with much faster creatures