Did you decide what you would do yet
This popularity finally caught up with Goryos Vengeance in October
Unfortunately, even though Desmond really wants you to control and kill a lot of assassin creatures, there just arent enough good ones in mono-black to justify building around them
Despite the high count, there's a lot of great reprints here: Bojuka Bog for free GY hate, Path of Ancestry is fantastic in tribal decks, and we have a whopping 7 lands that can enter untapped and tap for both colors of mana, which is the highest for a precon that I can think of
EXTRA BOOSTER -ONE PIECE Heroines Edition vol.2- [EB-05] Key visual revealed
Access Tunnel, Tetsuko Umezawa, Fugitive, and Skrelv, Defector Mite are just a few popular ways to guarantee that you can activate ninjutsu abilities