Aztec Bloodstone

A ceremonial stone head, known as a bloodstone, created by the Aztecs in the mid 14th century for use in human sacrafices. If a person cuts their finger on the stone's crystal "teeth", they will seek a woman under 10 years old and sacrifice them for the Aztec god Huitzilopochtli. If the stone headress is placed in the stone, the "mouth" and "eyes" will close and be deactivated.

Origin
The Aztec people were certain ethnic groups of central Mexico, particularly those groups who spoke the Nahuatl language and who dominated large parts of Mesoamerica from the 14th to 16th centuries. The Nahuatl words aztecatl (singular)and aztecah (plural) mean "people from Aztlan", a mythological place for the Nahuatl-speaking culture of the time, and later adopted as the word to define the Mexica people. Often the term "Aztec" refers exclusively to the Mexica people of Tenochtitlan (now the location of Mexico City), situated on an island in Lake Texcoco, who referred to themselves as Mexica Tenochca or Cōlhuah Mexica.

While human sacrifice was practiced throughout Mesoamerica, the Aztecs, if their own accounts are to be believed, brought this practice to an unprecedented level. For example, for the reconsecration of the Great Pyramid of Tenochtitlan in 1487, the Aztecs reported that they sacrificed 80,400 prisoners over the course of four days, reportedly by Ahuitzotl, the Great Speaker himself. This number, however, is not universally accepted.