23 cards where it’s legal in Standard and the card types include “vampire” and the color identity ≤ BR and (the rarity is equal to rare or the rarity is equal to mythic)

Falkenrath Pit Fighter (Innistrad: Midnight Hunt #137)
Bloodthirsty Adversary (Outlaws of Thunder Junction Commander #157)
Cemetery Gatekeeper (Innistrad: Crimson Vow #148)
Slaughter Specialist (Innistrad: Midnight Hunt #122)
Vadmir, New Blood (Outlaws of Thunder Junction #113)
Voldaren Bloodcaster // Bloodbat Summoner (Innistrad: Crimson Vow #137)
Voldaren Bloodcaster // Bloodbat Summoner (Innistrad: Crimson Vow #137)
Vraan, Executioner Thane (Phyrexia: All Will Be One #114)
Dominating Vampire (Innistrad: Crimson Vow #154)
Falkenrath Forebear (Innistrad: Crimson Vow #111)
Florian, Voldaren Scion (Innistrad: Midnight Hunt #223)
Preacher of the Schism (The Lost Caverns of Ixalan #113)
Sanguine Spy (Streets of New Capenna #93)
Voldaren Thrillseeker (March of the Machine #171)
Anje, Maid of Dishonor (Innistrad: Crimson Vow #231)
Bloodletter of Aclazotz (The Lost Caverns of Ixalan #92)
Bloodvial Purveyor (Innistrad: Crimson Vow #98)
Henrika Domnathi // Henrika, Infernal Seer (Innistrad: Crimson Vow #119)
Henrika Domnathi // Henrika, Infernal Seer (Innistrad: Crimson Vow #119)
Kinzu of the Bleak Coven (Phyrexia: All Will Be One #406)
Queen's Bay Paladin (The Lost Caverns of Ixalan #115)
Olivia, Crimson Bride (Innistrad: Crimson Vow #245)
Olivia's Attendants (Innistrad: Crimson Vow #172)
Vein Ripper (Murders at Karlov Manor #110)
Bringer of the Last Gift (The Lost Caverns of Ixalan #94)

In the blink of an eye, they strode from deep snow to the end of this search.