The Ah Nacom was, among the mayan culture, the one who executed the sacrifice.
Most human sacrifices were by blood-letting, in which a victim, usually a priest, voluntarily pierced a part (or parts) of their body... usually their tongue, ears, lips, or penis—and "gave" blood to the gods. The higher one's position in the hierarchy, the more blood was expected.
Some ceremonies demanded the living heart of a victim, in which case the victim's limbs were held by four people associated with the god Chaac, while the Ah Nacom extracted the heart quickly.
