>>96109597
Yeah, I guess elves makes the most sense. And there is plenty of precedent for them in black. Red is actually much rarer for them. My only leaning towards vampires is that functionally that's what they are both in card mechanics and in lore, just elf vampires. Magic doesn't ever really make such a distinction though.
Elf creature type has very few interactions with opponent cards but Vampire has a fair number that could be interesting to allow to happen.