Not much is known about the rule of Ha ' K 'in Xook ; his reign , along with that of Yo 'nal Ahk III , have been referred to as " shadowy " by Flora Clancy , and James L. Fitzsimmons argue that Ha ' K 'in Xook seem to have been a weaker ruler when compared to the reign of Itzam K 'an Ahk II because Ha ' K 'in Xook erected few monuments , and he did not reinforce his power on a larger scale , choosing only to do so at local polities . The only notable recorded event that have been preserved during the life of Ha ' K 'in Xook is of an incident that took place at El Cayo , most likely related to the burial of a contemporary sajal . According to Zachary Nathan Nelson , the reign of Ha ' K 'in Xook seem to have been relatively free from war , as none of his extant stelae show representation of captives , and known records do not indicate any sort of " bellicose action " in the region during his reign .