Yaaxil

Yaaxil are the guardians of the Silver Box of Ix Chel.

Biography
Lara Croft saw some creatures killing Trinity soldier in the Peruvian jungle. She described them to Abby as fast and making hissing sounds, Abby though Lara was joking, as she described the legend of Pishtaco, a mythological boogeyman figure in the Andes region of South America. Lara was however certain on what she saw.