Maya Limestone Yaxchilan Lintel 41. Shows Yaxun B'alam, with a female figure, Lady Wak, both dressed in war costume and wearing Tlaloc headdress. Yaxun B'alam IV, also called Bird Jaguar IV, was a Mayan king from Yaxchilan. He ruled from 752 until 768 AD, continuing the period of prosperity started by his father Itzamnaaj B'alam II. He had to struggle to take and hold power, as he was not perceived to be the rightful heir to the throne. Several buildings were constructed during the reign of Yaxun B'alam, including Temple 33 and Temple 21. During his life, he captured at least 21 people, as evidenced by the statement on Yaxchilan Stela 11. His seventeen-year reign was much shorter than that of his father's, and he died in 768. Within a generation of his death, the building projects at Yaxchilan had ceased.