25 cards where the card types include “vampire” and the colors is BW and it’s legal in Historic

Amalia Benavides Aguirre (The Lost Caverns of Ixalan #221)
Arvad the Cursed (March of the Machine Commander #317)
Arvad, Weatherlight Smuggler (Alchemy: Dominaria #20)
Astarion, the Decadent (Commander Legends: Battle for Baldur's Gate #265)
Baron Bertram Graywater (Outlaws of Thunder Junction #195)
Bartolomé del Presidio (The Lost Caverns of Ixalan #224)
Clavileño, First of the Blessed (The Lost Caverns of Ixalan Commander #2)
Cleric of Life's Bond (Zendikar Rising #222)
Cruel Celebrant (The Lost Caverns of Ixalan Commander #267)
Drana and Linvala (March of the Machine #222)
Edgar, Charmed Groom // Edgar Markov's Coffin (Innistrad: Crimson Vow #236)
Edgar, Charmed Groom // Edgar Markov's Coffin (Innistrad: Crimson Vow #236)
Elenda, the Dusk Rose (The Lost Caverns of Ixalan Commander #268)
High Marshal Arguel (Alchemy: Ixalan #24)
Indulging Patrician (Core Set 2021 #219)
Legion Lieutenant (The Lost Caverns of Ixalan Commander #275)
Markov Purifier (Innistrad: Crimson Vow #241)
Pitiless Pontiff (Ravnica Allegiance #194)
Regal Bloodlord (Core Set 2019 #222)
Ruthless Lawbringer (Outlaws of Thunder Junction #229)
Sanguine Savior (Murders at Karlov Manor #230)
Silverquill Pledgemage (Strixhaven: School of Mages #233)
Vito, Fanatic of Aclazotz (The Lost Caverns of Ixalan #243)
Vizkopa Vampire (Ravnica: Clue Edition #217)
Vona, Butcher of Magan (The Lost Caverns of Ixalan Commander #293)
Wispdrinker Vampire (Murders at Karlov Manor #243)

The message was clear to Sorin—time to search for something else.