Sacrifice was the offering of food, objects or lives to obtain some benefit.
Faction Paradox often made blood sacrifices during their rituals, but never to the degree of killing a human. (PROSE: The Book of the War)
To obtain a prophecy from the Unkindnesses, the supplicant had to make a sacrifice of food. (PROSE: The Book of the War)
Mother Sheila tried to kidnap Bobby Bowden outside of Sonny's Bar-B-Q on Apalachee Parkway in order to sacrifice him. (PROSE: Hanging Chads)