Seek the Wind Serpent Goddess

You are prepared, but I'm not certain that you're ready for what is to come. When you cross back over into Quetz'lun's altar area, you will enter the realm of the dead. From what I can feel of it, it's not going to be pleasant. Try not to be distracted by what you see in there. Simply head for the altar building and seek out Quetz'lun's Spirit.