Jaguar House Key
It is found in a side chamber of the court with the statues of the Lords of Xibalba who guard the entrance to the underworld. To obtain this key Lara has to simply find her way through the short dark crawlspace inside the Jaguar House. She then needs to insert it into one of the four slots on the table in the court of the Lords of Xibalba. This key has been painted with blue colour.