This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Xelhua (Aztec)
Xelhua is one of the seven giants in Aztec mythology who escaped the flood by ascending the mountain of Tlaloc in the terrestrial paradise and afterwards built the Great Pyramid of Cholula. One of the six giants sons of Mixcoatl. A Dominican friar wrote this account: Before the great inundation after the erection of the world, the country of Anahuac was inhabited by giants, all either perished or were transformed into fishes, save seven who fled into caverns.When the waters subsided, one of the giants, called Xelhua, surnamed the 'Architect,' went to Cholula, where, as a memorial of the Tlaloc which had served for an asylum to himself and his six brethren
He built an artificial hill in the form of a pyramid. He ordered bricks to be made in the province of Tlalmanalco, at the foot of the Sierra of , and in order to convey them to Cholula he placed a file of men who passed them from hand to hand. The gods beheld, with wrath, an edifice the top of which was to reach the clouds. Irritated at the daring attempt of Xelhua, they hurled fire on the pyramid. Numbers of the workmen perished. The work was discontinued, and the monument was afterwards dedicated to Quetzalcoatl.