Blood Economy

From BoardGameGeek:

You are a vampire managing a tableau of human thralls. Each thrall provides powerful abilities while alive. But you must devour them for blood to survive the night. Every turn you choose: Play a thrall for future power or devour one for blood. 16 turns to survive, 4 escalating blood requirements. As you devour thralls, you collect bond symbols that unlock vampire abilities: Spades for explosive blood generation, Hearts for suspicion management, Diamonds for card advantage. Blood Economy is designed under a 36-card constraint: 30 thralls, 5 vampires, 1 reference/tracker. No dice, no boards, no tokens beyond what you have at home to track turns and resources. Each vampire transforms the strategy completely: the Elder rewards balanced play, the Beast demands aggressive feeding, the Socialite focuses on preservation, and others. With 30 scenarios printed on card backs (ranging from beginner tutorials to expert challenges), you get 150 unique combinations. -description from the designer