This figure decried the violence of the worshippers of the Daevas using his authority as zaotar.
In the scripture written by this author, he poses the questions "Through whom does the moon wax and wane?" and "Who, by procreation, is the primal father of Truth?" That work by this author identifies this figure as a member of the tribe of Spit?ma, his ancestor. A later text reveals that this figure was among eighty priests that were martyred during an attack on the court of Vishtaspa. This figure attempted to establish recognition of the lord of trial by water, Varuna, or Apam Napat, who also upheld  the cosmic principal of justice dubbed (*) asha. This figure decried the violence of the worshippers of the Daevas using his authority as zaotar. This author wrote the Gathas in the same language that would later by used by the Zend-Avesta, which proclaims the supremacy of Ahura Mazda. For 10 points, identify this Iranian prophet who founded a dualistic religion.
In the scripture written by this author, he poses the questions "Through whom does the moon wax and wane?"
{Zoroaster} [or {Zarathustra}]