[Chaos]

Vampires are also meant to only get blood from certain kinds of enemies (see: PC races that aren't Lich/Dullahan/Mechanation, pretty much every enemy type that isn't Bandits), and lose blood/Essence from standing in broad daylight, as well as a few other things I'm probably forgetting. These are not mechanically represented for the player's convenience, so please understand when I say that in Vampire's case, not everything they do mechanically is going to match 1:1 with the lore.

Spirit Jar sounds a bit too powerful, especially if they're in any sort of fight that involves a lot of (NPC) enemies.
Legume Install sounds better, but still a bit iffy, since Vampires aren't exactly meant to go into a fight and wage a war of attrition.